No, I wouldn't. It would just be a MacBook without a keyboard. Would be awful to navigate. OSX just isn't ready for touch-screen. You'd be working with tiny, fiddly controls. Apple is leveraging their fat-finger iPhone UI.
Plus I dunno how you'd get to the low power consumption. It comes with a *10 watt* power supply. A 13" Macbook power supply is a 60-watter.
The power supply isn't the final say on power consumption, but it's a good indication of peak consumption.
Presumably, the power supply has enough to supply peak power AND charge the battery, so consumption is probably well under 10 watts.
How long before Al Gore checks-in with how many years this announcement puts-off our demise by global warming?