I think people are expecting so much more then what I think Google will in fact produce. I may be wrong, but I just expect Google Os to be something to be used in a pc with small hard drive, some good networking capabilities small disk and no graphics card with the os booting up in 10 seconds and with an UI with some giant buttons pointing you to the web and to the apps of google. In the meantime Google will certainly figure out some inovations like the way to store files which will certainly have a web based option, but nothing that will compete on the same market as the regular OS. It will be the return of terminals (but under the hat of cloud computing).

And if I'm right there will be a huge wave of disapointment.