How long can you expect your Vita battery to last when you're gaming? 3-5 hours, says Sony.
According to a report on Eurogamer, that breaks down to: "five hours of video playback or nine hours of music playback, if in standby mode. It'll take approximately two hours and 40 minutes to charge from empty."
Now, I'm not denying that there aren't a lot of great-looking games coming out soon for the system, but after having to deal with a 3DS that I can barely take outside of my living room without needing to charge it again, the prospect of another handheld system that might not last throughout the day (with off-and-on gaming sessions) is an incredible turn-off.
In addition, the system "will ship with a USB cable, AC adaptor and power chord." Apparently memory cards will (as with most Sony products) be sold separately. Still, there's a chance that it might come packaged with a completely useless 1GB one.
I haven't dismissed the Vita as a day-one purchase yet...but it looks like it's going to be a tough decision.