Well, Nvidia is feeling the push by AMD, since AMD is launching some great products at great prices (yes rebranded mostly but at great prices) and they have plenty of experiences in Bundles. Nvidia is doing the same.
Don't get me wrong i love watching this 2 compete is much more closed than AMD/Intel.
But Nvidia...i feel them a little bit more...clumsy. GTX 780 ti? what 5% more powerful than the regular 780 and 5% slower than titan unlesh they drop 200 bucks off the 780 and 100 off the Titan, and launch the TI 50 bucks lower than the 290x i don't see any market.
G-sync? well, thats a bit of a gimmick to me. Since AMD released a VESA Patch i don't see the advantage of G-Sync out of being propetery (thus working better under Nvidia hardware)
Then the Games, i have seen fanboys fighting over the bundles...well if you ask me, i still see Nvidia GPUS bundle with Just Cause 2...thats a $5 game, AMD does the same with Dirt 3. This games are better no doubt about it, but the way they're gonna give them is so much idiotic.
Thats why i like AMD bundles more, i know that for now the 290x is the only to be bundled with Battlefield 4 but it's gonna be bundled with other later, AMD has done that.