One of the things you need to remember is that in general, web app developers need to target yesterday's browser on yesterday's hardware. So they tend to be fairly conservative about the performance requirements. But as browsers and hardware improve, the benefits trickle down until suddenly, it's possible to do something that you never could do before. So sure, the average web app, which is designed to run on old versions of IE on outdate hardware, probably won't see much of an improvement to this. But cutting edge demos absolutely will. And when this version is the "old browser running on old hardware", general purpose web apps will absolutely be able to take advantage of these improvements and do things that would simply be unheard of beforehand.