well the whole computer is always slow/behind the curve.. a console gets old in what.. 3-4 years (when a new one comes out) and on average a new console costs about 500 dollars.... you can just spend thatn 500 dollars upgrading your pc....

installing games - i agree with you this is tedious.. putting in a CD/DVD and playing right away is one of the ways a console shines.
games - there is a similar amount of games for pc as there are for consoles.
controls - i guess its a matter of prefrance.. i hate controllers. too few buttons.
interactivitiy - consoles are great at sharing with friends.. with a PC your friends just watch you play.
multi-task - console has limited uses. play media or play game... pc - virtually unlimited do your taxes while video confrencing and watching porn.

not enough to sway me to drop lots of cash on it

i think the only way i will justify a console is if
a) i get it for free
b) i get a new tv and i can fully enjoy the console... $$$