It might be some future for niche/specific uses, but i'm certain the current model of downloading an installer for applications and games or having a (non-sand

It might be some future for niche/specific uses, but i'm certain the current model of downloading an installer for applications and games or having a (non-sandboxed) downloader like Steam, Galaxy, Origin, EGS, etc will remain the most common by far. Unless Microsoft tries to force that, but they'll certainly face a lot of resistance and with their apparent coupling of Windows Store with the sandboxing model they could face antitrust issues that would dwarf the IE vs Netscape case of the 90s as there are way more money and businesses involved nowadays (and of course Valve/Steam waving their Linux support all over MS' face :-P - that story has calmed down now but consider how many companies flared up just because of the idea that MS could potentially lock down Windows with Win8).