Sony Vaio Z series, now with a Thunderbolt powered external dock containing a GPU, Blu-Ray drive, and some more ports. Sadly Sony found a way to screw it up though, as they are using some proprietary port, and one USB 3 port to run the dock, instead of the standard Thunderbolt port. Still, it's a start.

Sonnet also announced some Thunderbolt to PCIe devices at NAB.

Some interesting GPU testing from HardOCP on needed PCIe bandwidth for gaming.

This is looking pretty promising for my next gaming capable system to be a laptop again, without sacrificing too much in the gaming performance space.