the back screen is used less than the frontscreen, and the whole front touch screen is a regular screen too. and i't got 2 camera's that i've personally never used
the rear touchpad is only used for features like special attacks or certain little things. a lot of the time (for me) it isn't too necessary
Yep, You can just plug in your headset and all voices will be going through it while you can just speak freely in your Vita. You can also video chat using Vita's cameras (although I don't do that)
meh. ive got smartphone which does all that better. vita needs to stay gaming machine and not add unnecessary crap. and you cant even run skype while playing vita games can you?