Actually looking at the vids from now and previous incarnations the freescale units seem to be slow compared to the others.
I think the best cpu for power use would be the Snapdragon with it being faster clock for clock than cortex cores and 1.3ghz and dual core 1.5ghz units on the way.
The last option is the Nvidia Tegra which seems to have 12 units including a good few netbooks on the way. IIRC it is a 667Mhz Arm 11 with DSP and GPU, They have HDMI out and think support 1080p on the HDMI.
However the results seen from omap seem good so far so hopefully there will be enough netbooks based on this to give us some nice options.