The Vortex III hasn't been around that long, as far as I know a replacement wouldn't be happening until the next generation of graphics cards or processors were to come out, and that's not for a fair while yet. There is the Clevo P370M but that has no ETA at the moment. http://www.pcspecialist.co.uk/forums/showthread.php?18703-New-laptop-case
There will not be a Vortex IV in 2012, it will probably be Q2/Q3 2013 before this is released. However, there will be a 4GB GTX 675M and 3GB GTX 670M released perhaps early on in 2013, maybe at the end of 2012.