We've learned that Nvdia's G1x0 renames for its entry levelcards are the real deal but they will only affect OEM business.

This won’t affect the retail channel business and the new brands will only happen with OEM retail machines. OEMs want new chips and Nvidia is not ready with anything better than 9400, 9500 and 9600. Since Nvidia doesn’t have anything now and OEMwants to launch new machines, they will simply rename them to G120, G130 and G150.

Next generation chips might all get the naming scheme where high end is GTX, the performance is GT and entry level is G, but this is something that has yet to be decided.