NVIDIA's Tegra mobile processor roadmap reveals the second-generation Tegra will arrive by mid-February 2010, and that this chip will be up to four times as fast as the current generation without consuming significantly more power:
The second generation Tegra part will offer a 400% performance increase in terms of performance. While this "performance increase" is not specified, we know that the company will utilize parts that are designed for TSMC's low-power process. Thus, you can expect to see a next-gen ARM core [Cortex instead of ARM11] in a dual-core form, and a GPU subsystem based on the GeForce 9 architecture. We expect that nVidia will tout CUDA and OpenCL compliance with the Tegra Gen2. Don't even get us started with Tegra Gen3 - the GPU on that will be more than a beast.
Truth to be told, GPU is already utilized much more inside Tegra than it is on the PC side of the fence: image processing, video processing, transcoding, OS acceleration, application acceleration - all this is being utilized inside mobile operating systems - every miliWatt counts here.