Did You Know Gaming just released a documentary on the WonderSwan a few days back and it got me thinking that there should be a revival of handhelds that adopt Yokoi's design philosophy.
For a while, I've had an idea of a handheld system that can be played with one hand. The d-pad or analog stick would be on the front face of the handheld and the buttons would be on the side.
I have no plans on making it, but I think there is still a market for dedicated handhelds like this. The only handheld that is doing anything like this is the Playdate and from what I can tell, it isn't very cheap.