Two more computing-related areas that I think will also be platforms in itself:
1) Trustless Payments + Transactions (aka Blockchain and Bitcoin technology) If we can send payments or transactions without heavy intermediary intervention or frictionlessly (at no cost or time), then it opens up a whole world of “apps” and “business models” that we can’t even yet fathom.
2) 3D Printing (ok a bit of a stretch with computing here), I think is also in it’s awkward adolescence age. Until we either all have a 3D Printer (like we do a Microwave) or access to one (Kinkos?) shipping atomic bits over bytes will change some consumer retail behaviors.