I'm not sure if it has mass appeal but holy shit I'm intrigued, Valve's hardware division is good at building stuff that works incredibly well for some people

and like, other companies have proven that a small Ryzen-based handheld is doable, Valve has the money to get smaller, more optimized board designs and really tweak the design

I like getting games (even multiplatform indie games) on the Switch rather than on PC because I know I'll play them more if I have the option for handheld

not sure about the control configuration but I like that they kept the trackpads (I love the Steam Controller for many games) and more buttons on the back + Steam's excellent input remapping system means the buttons and D-Pad are very much optional, just keep your fingers on the sticks/pads

oh, and you can install Windows on it, apparently https://partner.steamgames.com/doc/steamdeck/faq

also, for many games, this is the Switch Pro gamers have been asking for

it even plays Nintendo games, you can just install Dolphin

biggest downside: potentially having to carry both the Switch and the SD

also look at this fake Windows 10 deskop