HDMI 2.1 please. Yes I am a gamer (sometimes).
Also, better cooling to compensate for the warmer M2 chips, so that the new models run no warmer than the existing M1 versions.
On behalf of those who prefer dark case colors, it would be nice to have the finger print issue addressed if the new models include those darker color options; although I don't prefer those colors, the issue is embarrassing for an Apple product, IMO. I prefer silver and starlight, personally.
I don't mind the notch, wouldn't mind not having it either.
My current laptop is a 2012 MBA (fully functional in mint condition, with MagSafe and a card slot). I've been waiting to update it for a long time. I had intended to replace it with an 2017 MBA, but that was a failure. I traded the 2017 MBA back to Apple for a credit after replacing a faulty USB-C controller. Lesson learned: USB-C charging is fine for a casual iPad, but not for my primary computer. The credit still sits on my Apple account balance, waiting...waiting...
I almost bought an M1 MBP (with MagSafe and card slot!) but decided to wait for the video encoding benefits of the upcoming M2 chip. Another option for me is an M2 Mac Mini, especially if it includes support for HDMI 2.1.