Here's my question: Why do people wait in line for weeks, pay lots of extra money, or pre-order systems months or years in advance just to get it on the day it comes out? It just doesn't make sense to me.
Point 1: You'll inevitably save money.
While this isn't always going to be true, it is for those people buying the new system on ebay, or those who are forced to buy expensive bundles which include games you don't want. Plus, if you wait a year, the price will most likely have dropped, giving you even more savings.
Point 2: There will be less bugs
There are always stories of consoles dying right after you bring them home, or in the Wii's case, right after you get a firmware update. If you are willing to wait a little while, most of the bugs in the software will be fixed and you'll be able to enjoy your new games with no interruptions or hassle.
Point 3: The games.
How many people have bought crappy games just because they were the only titles available for your system and you needed something to play? Take the PS3 for instance, there isn't one game that looks even remotely interesting. The Wii isn't much better off, it is only saved by having great franchises like Zelda to lean on. It takes most developers a while to get used to a new system, so great games won't start appearing for at least 6 months. In the mean time, you've wasted 150 on games that you never really wanted to play.
OK, that being said, I guess I do have to thank all you crazy people for going out and buying the system right away so there isn't a big rush for it in 6 months when I pick mine up. But for now, I'll be playing Final Fantasy XII on my PS2 and laughing at all you people trying to figure out what's wrong with your $15,000 playstation 3 you bought on ebay.