Let me predict the future:

January 2008 Nokia will announce new internet tablet, model N900. It will feature minor hardware upgrades, hw keyboard, 3d support, two cameras and OS2008. Software developed for N900 won't be fully compatible with previous models and OS2008 will not run in 770 or N800. Software developers will be pribed to new device by offering it to them at 1/4 of the normal retail price in order to ensure their intrest solely to new hardware version.