volt, your reasons not to be enthusiastic about MeeGo as N900 owner are all based on the assumption that MeeGo won't run on the N900, but the MeeGo project or Nokia haven't said anything about that.
You are free to make your own assumptions but don't forget they are your own assumption. Again, it would make sense to make conclusions only after a first release.
The applications you are using today will be there also tomorrow, isn't it.