It's gonna be interesting to see the marked difference between the application selection between iphone and android\nit.

The open platforms without DRM and commercial 'repository' (read:store) will have a majority of service-centric apps (google apps (maps, mail, cal, etc), voip clients (skype, jajah, etc)) where the producers will make money either from the traffic (for ad placement, data gathering, etc) or their services (eg:skype or jajah premium services). Of course the usual slew of open source apps will make their way here too albeit at a moderately slower pace. Commercial quality standalone games will probably make it last to this type of biz model if at all.

Nokia will bound to try to put in their iTunes store-like solution into the mix to try jumpstart the content before\with step-5.