As expected, Windows will continue to release multiple versions of the Windows7 OS.
They will try to market 2 main versions, with others available for more specific uses, such as low end boxes in third world countries (however that version will also be available to local PC builders too, indicating alot of underpowered and feature stripped systems again).
http://www.neutek.net/windows-7-will-ship-in-6-different-versions_20090204.html