OK so some lovely person has put loads of vids on youtube from the Planetside 2 presentation at GDC. Lots of in-game footage and explanations.
These videos may explain why it's Planetside 2 I'm looking forward to far more than Guild Wars 2...
Vehicle pad and flight video with accelerated day/night schedule
Direct link http://youtu.be/KSXXEOJUcG0?hd=1
Outdoor battles, all sorts of carnage
Tanks, infantry, Galaxy transport :) , customising inventory, etc, etc
Campaign map, more infantry stuff, base capture, stats, guilds, etc.
Ground stuff, not much action in it but shows the style of some buildings, etc.
Some nice screenies here too.