First reason to wait would be the price. How many are waiting for the first price drop? I think this could be many, I was able to cough up the $500 but many in this economy can't. If this is your reason, what price would it take?
Second , the release of a blockbuster games. Titanfall I have no doubt will sway a few on over but I think the major push would be Halo 5. Halo has been Xbox's driving force since the first game was released. Can we expect maybe a pricedrop and Halo 5 at the same Time? If this is your reason, what game would it take?
Third, new options, maybe backward compatiblity so people can sell off old devices, New software updates, new bundles, new add ons (Looks at Illumiroom) If this is you, what new option would it take?
I know there are many Xbox 360 fans out there, many, Including my friends are waiting to make the jump. From my personal experience it's due to the price and being broke, many are waiting on a price brake, Catching up on bills and trying to put some money back in the bank after their Christmas extravaganza.
Whats your take?