MeeGo is tied to Qt and Qt's future is in risk. Surely KDE can fork Qt but this won't help. One of Qt's big advantages is that it's cross-platform, but an opensource project most probably won't continue that. People from KDE may improve Qt but this will be done mostly with Linux in mind. Of course Qt may become something like the Linux kernel wheren OS vendors may jump in and add support for their OS, but i seriously doubt that.