There are actually a few decent choices for eye tracking now (a company that was just acquired by Bytedance had a pretty good eye-tracking standalone), and there are a few crazy headsets that do all of your listed requirements for 1. and more, but they're all in the $1,000+ range.
Lighter-weight headsets is something necessary but also something that is in sort of a weird spot. The Quest 2 is actually a lot heavier than average, because it's standalone. As cool as it is, it's regressive in some interesting ways.
For better displays, there's already some pretty impressive displays these days if you don't mind jumping up in price a few notches. Enthusiast-range, for sure, but still consumer models.
Honestly, it depends on what your setup is. I would recommend taking a look at the recent Pimax headsets, the Quest 2, and the new Reverb G2 Omnicept, figuring out which features you can't live without (and which price tags you can), then picking one.
Lighter-weight headsets is something necessary but also something that is in sort of a weird spot. The Quest 2 is actually a lot heavier than average, because it's standalone. As cool as it is, it's regressive in some interesting ways.
For better displays, there's already some pretty impressive displays these days if you don't mind jumping up in price a few notches. Enthusiast-range, for sure, but still consumer models.