Think about it...CloverTrail+ already beats snapdragon 600.
Bay Trail, to be released in 3rd quarter, is expected to be 3 times faster than CloverTrail+.
On top of this, in early 2014, Intel will release Broadwell (Haswell on 14nm), which will fit into 7" and 10" tablets (fanless) running full versions of Windows/Mac/Linus/Chrome OSes. There is no way arm can keep up.
I think we will have to wait till release to see a power analysis done on it. My guess is that it will run the same wattage as Snapdragon. Most chip makers tune these things max at a certain wattage unless you are Samsung of course then you don't care if the battery lasts only three hours.