What a stupid idea. My son just bought a 0.78" thick HP Envy 6 Sleekbook (like an ultrabook but with an AMD processor). It has a 15.6" LED display, a NextGen AMD A6-4455M dual core 2.6 GHz processor, 6 GB of RAM (upgradable to 16), AMD Radion 7500G video with 1 GB RAM (supports 3 GB using shared system RAM) and an HDMI port. It also has three USB ports (two are USB 3.0), stereo speakers and a subwoofer, and it even included a really nice set of Beats Solo HD headphones. Anway, my point. It's a sleekbook (ultrabook), my son is very happy using it for gaming (he mostly plays Minecraft, but also plays a few multi-player online shooter type games, and a lot of games from Steam.), and it was only $630.00. I know it isn't a really powerful game machine, but it's more than adequate for the typical gamer, and anyone who wants a really powerful game machine probably isn't interested in playing games on an ultrabook anyway. So, if I'm right about that, doesnt' it kind of blow the whole theory behind this external Thunderbolt GPU?
By the way, DrageMester, the links worked for me. Maybe they've been fixed.