Am guessing you are talking about laptops, video cards and specially Intel ones. There is an improvement mentioned in sites like Phoronix and OMGUbuntu but for what I have tested, is not yet activated. It should be by the end of 12.04 since the patches and changes are going to be applied to the 3.2 kernel anyway, which is the default for 12.04 now.

Why I suggest is to wait for the final release since this is an Alpha and an Alpha 1 for that matter and since our problem is very bad (power sucked out quickly and temperatures really bad) it is better to test it with something stable than something not quite finished yet.