Never settle. That's AMD's motto for their new Radeon HD 7900M series of GPUs for notebooks. In terms of specs, the Radeon HD 7970M nearly meets what the desktop Radeon HD 7870 GPU, except for slightly lower GPU core clock speeds.
The HD 7970M sports 1280 Graphics CoreNext stream processors, 80 TMUs, 32 ROPs, and a 256-bit wide GDDR5 memory interface which features 2GB of memory. Core clocks are at 850MHz, with 1200MHz (4.8GHz effective) GDDR5 memory clocks which push out 153.6GB/sec memory bandwidth.
The Radeon HD 7970M also features something called AMD Enduro Technology which "seamlessly powers down" the GPU when it's not required, to below even 1W. The HD 7970M should be seen baked into notebooks over the coming days.