I kind of wish that Apple rolled the various 'stores' into a more unified interface, and did something like they did with quicktimeX for itunes (ituneX? ha).

I think it may be more possible now that they are starting to rely/focus on icloud for various things (backups, match, sync). There is still a close relation between syncing media with iDevices via itunes though, so I can see how unifying stores outside of itunes would be challenging and possibly confusing to many end users.

I really would like to see itunes becomes lighter and more usable though.