I would like to see someone trying a capacitor bases wireless gaming mouse, but that won't happen because it isn't mainstream enough.
I think Genius has already built such a mouse.
What I'd like to see-- though this is not really practical with current technology-- is a wireless mouse with very little battery/capacitor capacity, paired with a dedicated mousepad with inductive charging. This way, it'd never run out of power, and you wouldn't have to deal with the size and weight of more energy storage (though you would want to try and get the inductive charging system as light and small as possible). There have been other solutions to reducing cord interference, like top-exiting and side-exiting cables, but there is still a cord there. Ideally, there would be no cord, not only to prevent interference with movement, but also because the cord is a frequent failure point on mice. But, at the same time, there are so many disadvantages and compromises associated with battery power that, for me at least, no mouse powered by batteries can be acceptable.
Regarding sensors, I don't think anyone is actually relying on just one outdated test, even if the same one tends to get linked for the sake of convenience. Basic tracking quality attributes, such as prediction, acceleration, jitter/glitches, lift-off distance, max control speed, etc., are easy to test on your own, and many people have done so with a wide variety of mice and surfaces, as well as contributing their subjective impressions, all leading to the current consensus that top-level opticals currently deliver more consistent tracking than any available laser sensor.
