To get a PS4 or Xbone one I need a price cut to $299 AUD (They're currently $550-$599 AUD) and either a next gen Monster Hunter or a next gen Bioshock that I can't get on Wii U.

Raining money.

PS4: Price cut and noteworthy games, free internet would be great too
Xbone: Dirt cheap

Vita: OLED version for under $199 (missed my first chance :( )
Vita TV: ~$130 with controller

X360: Needs to be no more than $99.

Last Guardian for PS4
a good Conker/Banjo for Xbone

Xbox One is currently $499 (without Kinect).

But I doubt we'll see another Bioshock for at least 18 months, so no rush!

For the PS4, a few more games and that's it. If I get a good bundle, better.

Xbox One - A price-cut plus a couple of really stellar Halo games and some new IP from Microsoft Studios. I'm not a fan of Gears so I was disappointed that Black Tusk had their game shelved.

Wii U - A price-cut and some awesome RPGs and maybe some of the 3DS IP, like Fire Emblem or Youkai Watch. More games that aren't Mario or platformers.

PS4 - Eventually.

3DS - Eventually.

For the PS4, just a lot of games that I'm interested in. I've got particular tastes and nothing interests me at all so far this generation, but last gen had a ton of stuff I liked so I'm holding out hope. Introducing PS3 backwards compatibility would make my purchase come waaaay sooner though. That alone would probably push my purchase into next year rather than four or five years from now.

Xbox One: A new Banjo Kazooie
PS4: IM willing to pay 100 dollars for it.