If there exist cloud services like google cloud calculator, where you can create and try aplications in their servers (or so they say), or OpenStack, for physicists (more specific information here).

The lag problem could be solved if you have an internet fastest, or at least similar, than the sata cables inside a computer (aparently some of 6 - 3Gb/s source) everywhere, that way proceses could be done like you do in . Also, you need a computer prepared for that, if not you could have cloud services with output HDMi and a pc that can't get it to a screen.

Games are a lot heavier than movies, but it would be very nice to have cloud gaming soon (I still can't believe that something like Onlive existed jajaja). Great post.