Mobile devices absolutely need and will benefit from more power.
What is the future of smartphones? For a lot of people, the best computer is the one they have in their hands already, the number of people who compute exclusively on their smartphones will continue to become bigger in the future. Performance, developers support, the cloud, camera improvements, foldable screens, battery life & true wireless charging are essential to that future.
What stops Google from making a dock for their PIXEL phones that actively cool the device and connects it to a display allowing us to do more?
Perfomance improvements and continued developers support will open up new doors, the original iPhone isn't 10 years old yet and the world has changed a lot since then. Patience! I am confident smartphones aren't not done shaping our lives yet.