I have this worry too, but I don't think it'll be as locked down as it could have been. Android has an clear advantage in the market (perception) and MeeGo has to bring something that can compete with that. Qt is just a platform, not a reason to buy it. So, I think they will have to keep it highly modable. After all, if they don't, what would then be the difference between MeeGo and Symbian^3? Different GUI colours? MeeGo is supposed to be the top end alternative, over Symbian^3.