If you dream about a web based OS becoming mainstream note that this would not happen for many many years, could be decades. The main reason is that the internet is still not reliable, fast and available everytime, everywhere as well as its not free. You have to wait until you could access your Web OS as easily and reliably as you access your personal desktop OS and the data it has. For example until the internet is available as easily everywhere as we receive FM/MW/Shortwave broadcasts on our radio sets whereever we are we would have to wait. The second obstacle is that it will not be good for your privacy and also you can lose all private access to your files on the web. If it got onto the web, it will stay on the web. You will lose control over your data since it would be on the web and you could be stopped to access it anytime by the big brothers. More It would take lot of years for the internet to reach the point stated above since there are still a lot of people who could just barely afford dialup. So use your current desktop OSes be they Linux or Windows and think about some other innovation which is possible.