The main thing that struck me about this whole subject is that there appears to be no provision (still) for keeping your NON-Metro applications usable. Looks to me that the same old tired routine of locating install media for ALL your applications, and all their install codes, and any updates they've had in the meantime continues to be required. Presumably this will mitigated somewhat by switching everything you can to Metro apps - but can you actually do that? I have my doubts

If they designed/enforced separate partitions for OS, apps and data then perhaps a truly useful reset/refresh might be doable. No - I won't mention where that sort of setup is likely to be found

Just look closely before you push the button the first time!