Well, I got the Switch 2 and played Mario Kart World. Hmmm...
First issue is the new HDR settings. I have an "older" HDR TV, and the S2 looks really washed out. Seems to be a common problem, with newer TV's being easier to correct. I haven't found a solution and am waiting on a patch.
As for the game, it's been a little bit of a letdown. Some of the courses are fun, but others are just downright boring. I find myself spacing out while holding down the A button. Most of the character unlocks are hidden behind this obnoxious "transformation" mechanism that's RNG-based and super rare. Tried to farm it for 30 minutes (wanted to get the football guy for my husband) and came up empty-handed.
My recommendation would be to wait for more Switch 2 games before purchasing.