Yah that feature is different though. I think windows Central did a review of eye tracking tech in games. It's a camera you add and literally you look around in the game and your character looks around instead of using the analog. It's pretty sweet.
But a feature that triggers iris scan without the power button would also be cool if it can tell it's locked and you're looking at it. But then it may trigger falsely too. And likely battery would be eaten up constantly scanning.
Seriously though I think that buying valve, moving it to UWP and having devs implement extra features because it could give them more sales would be a huge plus for windows mobile. Granted, these games are likely not made for ARM devices so MS would need an x64 phone. Or an easy way to port, like really easy.
But games seem to sell the most on all platforms.
Wonder if Microsoft will release the flip cover that acts as a second screen soon and you could create a gamepad on it.
Apparently uses e-ink technology. Though it's with Microsoft Research. It would probably take them a while to release.