> And it might even give us multi-day use out of our smart devices

I don't think you understand how software development works. Q: How much hardware do you need? A: How much you got?

The latest generation only gets the battery longevity because software developers still have to support the previous generation. As soon as enough e-waste happens, the gains disappear.

I might be a cynic but there sure seems to be a lot of empirical data to support my disorder.