It depends on your use cases. I think it's a good thing overall. I like the iOS app model much better than the desktop model.

I resent that desktop apps can basically reach into any part of my computer, take 20 seconds to close when I tell them to exit, prevent my computer from shutting down, hog all my resources when I'm not using them, actively steal focus if they decide, fail to run because of some "missing dependency", and do a half-assed job uninstalling themselves.