Should The Verge do a battery life comparison for Win8?

I was thinking it would be interesting to see what a laptop or tablet running Windows 8 in all Metro (Desktop never opened) vs Windows 8 in Desktop vs Windows 7.

Comparing the battery life while:

Windows 8 - Browsing in IE10 Metro

Windows 8 - Browsing in IE10 Desktop

Windows 7 - Browsing in IE9

Microsoft has stated that they are working hard on improving battery life for Windows 8 and IE10 Metro so this would put it to the test.