I'm not sure if I like implications of a web-centric OS, especially when its producer is as rich and powerful as Google. I see the market for it, and I think it will be a huge benefit for the average user. However, I see the transition from desktop-based software to web-based as a loss of user control. Today, when governments decide that mp3 sharing, porn, articles of political dissent, or news from non-national sources should be eliminated, they quickly realize, if they don’t already know, that elimination is impossible, because no agency can track down and deal with every user who has decided to install software allowing him/her to do these things. When software moves to the web, I think it will likely end up existing on the servers of one of an oligopoly of computing providers, who will be much easier to influence because of their small number, and because they will have no choice but to abide by legislation if they wish to remain in business.
This may not seem like an issue right now, because there is still choice. But with Google pushing a web-centric OS, I think within a decade, many people will have a hard time choosing something else, much the same way they had a hard time choosing something other than windows until the last five years.
Maybe I’m just a Big Brother fearing nut, but I don’t like where we’re heading.