I absolutely love that handheld gaming is coming back with tons of companies making tons of different stuff with different designs and all.
But it sucks that it all amounts to "what flavor of Steam do you want to run?". Valve might as well be monopolizing another entire sector of the market.

It's a bit uneasy to have one company controlling the PC market and also taking over the "handheld" (miniaturized PCs with screens, actually) market, even if indirectly.