not true ... especially for gaming. also "need" is subject to opinion.
one maybe "needs" to upgrade because he hates playing with less than 60fps constantly ...
i for example "need" to upgrade because my current PC can't handly Diablo 3 with minimum settings at 60fps ... it's a stutter fest ... sadly (in my case) i don't have the money to upgrade right now
as long as one is satisfied with the power his pc holds it is #2.
as soon as one is no longer satisfied and wants more it is #1 ... (and of course if something breaks ^^ that's #1 too)