Smartphones are already insanely energy efficient. But instead of tuning them for longer battery life, companies kept pushing for faster processing, higher resolutions and refresh rates in the last few years. Now there’s diminishing returns (imo 4k on a 6" device is just absurd) so I expect future devices to double down on energy efficiency. But then maybe companies just end up decreasing the battery’s capacity for lower weight…
Imagine the single USB C port being 40Gbit/s or even 80Gbit/s (USB 4 Version 2). Given a nice docking station and some additional enclosures, you could technically even connect hard drives and run the phone as a low-power NAS. Or/and as a multimedia station for your 4K TV, I mean the integrated GPUs are usually more than capable enough.
A bummer that they stick to USB 2 speeds, even for most high end phones.