Although Microsoft hasn't talked about how long the battery will last, don't expect much at 720x576. But if you have a TV to play the video content, this means you also have a plug to recharge your Zune. All you need is the AC charger :)

I also remind you Zune 2 supports h.264 and mpeg4 video codecs additionally to wmv.

[via ZuneInsider ]

EDIT (07 Oct): The Zune 30 won't get an upgraded TV out. It remains at 320x240. I still don't know/remember about the new codecs. From what I know Zune 30's processor can play these codecs, so chances are they come to Zune 30 too. 

EDIT (08 Oct): ZuneInsider says only Zune 80 will have a TV out with DVD quality. Zune 4 and Zune 8 players don't have TV out at all.

EDIT (09 Oct): OK I know it starts to get annoying: another small detail according to Gizmodo  (who confirmed it with ZuneInsider, is that we are talking about interlaced vertical scanning, not progressive. The difference is interlaced system first transmits the odd horizontal lines in screen and then the even. Here is an article on wikipedia and a very good animation to understand it. So in one sentence: Zune 80 supports 720x480 at 30fps (NTSC system for USA etc) or 720x576 at 25fps (PAL for Europe etc.). Did someone just say Europe ?!

EDIT (11 Nov): According to some Microsoft knowledge articles, Zune 80 will only support NTSC TV out. PAL which is used in Europe and other places worldwide won't be supported. Could this mean Zune 80 is not intended to be released in Europe or anywhere else except USA? Read more: Zune 80 TV out supports only NTSC

Related articles:
Zune 2 battery life reports
Zune 4 and Zune 8 won't have TV out
Zune 80 TV out supports only NTSC