This issue is that it probably won't be able to play what a lot of people looking for something like that will want to play on it.
If you're into indie titles that don't need much power to run, that thing is probably nice. Even then, a lot of titles like that will be running on medium-ish settings.
However, if you're casual gamer #4305606 and you want to play Skyrim, Witcher 3, Cyperpunk 2077, CoD, or other AAA titles on the thing, they're going to look and run like hot garbage.
It's a pretty niche product for PC gaming basically. That's not a bad thing, but thinking it will do anything near to as well as something like the switch is kind of delusional.
It's basically a tablet with some game controllers built into the sides of it and probably a gyro. Basically, anything that needs more than the average mobile tablet game isn't going to run well on that thing at all.