The only 2 consoles I didn't had at launch year, were Nintendo Gamecube (2004, instead of 2002), and Nintendo Wii (2007, instead of 2006).
I've got the GCN later on, because I still played the N64, and I didn't know what's the advantage above the newer generation.
But I got bored from the N64, as I've beaten everything over 9000 times, and there were no longer games coming out, and I've fallen in love at Pokémon Colosseum (I only can't remember it was because of the graphics, or the main character).
I've got the Wii later on, just because the Wii was always sold out, and I tried to get listed in all big toy shops and game stores, but these were full by every week.
I decided to do that anyway, and I've also found a lot smaller game stores, far away from me, but they can at least send it.
After getting listed on 3 of the smaller shops, I've got an call 2 days afterwards that it'll be shipped.
The funny part is, after I got the Wii, I got calls from nearly every single shop in every single city I was listed.
I've got the second Wii in 2008, as soon as the Twilight Hack came out, so I could do some safe testings.