Not really, but the cradle is nice because it can also charge your Go while it's plugged into the TV, but basically it makes everything much cleaner for use because you can just have it plugged into the cradle. More for convenience if anything.
and I assume battery drain while outputting is way higher so the battery would last even less.
Cool guys, thanks bought a Beautiful looking White PSPGo, Cradle and Component Cable for less than 60! Psyched for some Dissidia and FFTactics WOTL on the TV