there’s a good chance laptop and desktop hardware support improves even further just because they reuse parts across devices.

100% agree.

This is how Linux has caught-up-ish with respect to hardware in the first place. The BSOD from all the crappy drivers in Windows forced MSFT to create WHQL. Then MSFT charged for certification. Then OEMs started licensing IP that already had the certification instead of writing their own drivers for less well know IP. Someone writes a Linux driver for a certain IP and now a ton of systems are further supported.

These companies are definitely going to reuse IP across all their devices. Companies selling IP will want to sell their IP in as many markets as possible. They are going to write the Linux driver and say, "put this in your handheld."