I suspect "MeeGo" devices coming out this year will:
- provide the same version of QT and (possibly) Web Runtime
- have some way of installing RPM packages (which does not mean using them for the underlying OS -- you can do this sort of thing in Linux with alien etc)
- share the brand name

That's all they really need right now from a commercial perspective.

From 2011, all MeeGo devices will probably share a lot more, but I wouldn't expect anything more than this in the short run. It would be fun to have GeoClue and a couple of other things, but I wouldn't be surprised if they weren't there initially.