With Sony Having two handhelds, the PSP holding its on against the Nintendo DS! I consider it to be a huge success especially being Sony's 1st handheld. With over 75mil and counting who wouldn't?
Vita is a great piece of tech but is flawed by its price and expensive memory cards! It had a bad year but hopefully (will with a price cut) it will overcome this matter next year!
This thread is to point out the pros and cons of each!
Remember everything has both not just pros or just cons.