You can use the apps on mobile devices w/out the keyboard in a pinch, of course. The way the apps are partitioned so they can't crap all over each others' DLLs

You can use the apps on mobile devices w/out the keyboard in a pinch, of course. The way the apps are partitioned so they can't crap all over each others' DLLs and registry entries helps some as well. The single-source app store may or may not be a win for everyone, but making apps keep to themselves helps avoid fouling the whole OS install.