[texaswhizzle]

Why not just buy a solid controller for your phone or tablet?

How could this hypothetical device possibly be better than an iPhone 12 Pro Max, Note, Galaxy S, etc?

[0-_-0]

Just to add to your comment, you can already turn any phone to a "streaming Switch" for $30, there are dozens of controllers like this:

https://smile.amazon.co.uk/dp/B08BRX3RT3/

the Steam Link android app lets you stream any of your games to your phone like this already. With a little more setup you can stream Wii games to your phone through Moonlight from CEMU and run them at 1440p60, while the Switch can barely do 720p30.

[zwirbl]

by having access to the steam pc game library, which is huge

[texaswhizzle]

Both major mobile OS platforms support steam link.

[zwirbl]

The games have to be run on some machine though