Not very long ago, a phone was simply a tool for making calls. Over time, that small device quietly transformed into a camera, a calendar, a map, a library, a television, and even a bank. The force behind this transformation was the smartphone. Over the past three decades, no personal technology has reshaped everyday human life more than this single device.

Today, three of the most influential figures in global technology—Elon Musk, Bill Gates, and Mark Zuckerberg—are suggesting that the smartphone era may be approaching its limits. In their view, the future of technology will not remain confined to a handheld screen. Apple CEO Tim Cook, however, strongly disagrees. His argument is almost the opposite: smartphones are not going away. Instead, they will continue to evolve, becoming more powerful while coexisting with new types of devices. So what exactly are they each saying?

Why Musk, Gates, and Zuckerberg see a post-smartphone future

Although their companies, goals, and visions differ greatly, Musk, Gates, and Zuckerberg share one belief: the smartphone is not the final stage of personal technology. History supports this idea. The first widely recognized smartphone, IBM Simon, appeared in the early 1990s—meaning humans have relied on similar devices for more than 30 years. In the history of technology, when one platform dominates for long enough, a new one often begins to emerge.

What that next platform looks like, however, varies sharply in their imaginations.

Elon Musk: when the brain becomes the interface

Elon Musk presents the most radical vision. Through his company Neuralink, he is developing brain–computer interface technology that allows the human brain to communicate directly with machines. At present, this technology is being tested to help people with severe physical disabilities—enabling them to move cursors or control devices using only their thoughts.

But Musk has repeatedly hinted that such technology could eventually reach the general population. In that future, sending a message might not require typing or voice commands. Scrolling could disappear. A thought or a glance might be enough. Household devices could respond to mental instructions alone. Musk’s underlying question is simple but profound: if the brain can directly interact with technology, what purpose does a separate smartphone serve?

Bill Gates: technology worn on the body

Bill Gates is no longer focused on building consumer tech products. As an investor and philanthropist, his attention has shifted toward healthcare and human-centered innovation. He has supported research into ultra-thin sensors and digital tattoos that can be worn directly on the skin.

In theory, such technologies could collect health data, function as identification tools, and enable wireless communication. In this vision, the “phone” is no longer something you hold—it becomes something you wear. Technology merges with the human body itself. That said, major challenges remain unresolved, including battery life, privacy, and long-term safety.

Mark Zuckerberg: screens move to your eyes

Meta CEO Mark Zuckerberg believes the future screen will sit directly in front of our eyes. Through augmented reality glasses, digital information would appear layered over the real world. While walking down the street, directions could float into view. While speaking to someone, their name or relevant details might appear instantly. Foreign text could be translated the moment you look at it.

In this future, there would be no need to pull a phone from your pocket. For Zuckerberg, this is not just a technological shift—it is also a strategic one. Moving away from phone-based platforms allows Meta to escape Apple and Google’s control and build its own hardware and software ecosystem.

Tim Cook: the smartphone remains the center

Standing in contrast to these visions, Tim Cook argues that the smartphone is far from finished. From Apple’s perspective, the phone is becoming even more central. While the iPhone still generates a major share of Apple’s revenue, Cook’s reasoning goes beyond business.

Apple’s strategy is to gradually integrate new technologies into the smartphone itself—using artificial intelligence to enhance photos and videos, running translations and security analysis on-device, and monitoring health data through connected systems. Products like the Apple Watch, AirPods, and even future AR glasses are designed to work alongside the iPhone, not replace it. In this ecosystem, the phone remains the hub, while other devices act as companions.

One device or many?

At the heart of this debate lies a key question: will people suddenly abandon a familiar and trusted device, or will they slowly adapt to new technologies alongside it? Tim Cook believes the second outcome is far more likely. In his view, the future will not belong to a single gadget. Instead, phones, watches, earphones, and glasses will work together—each handling part of the experience, with none carrying the full burden alone.