Gear of War, Halo and Fable are great exclusive franchises. All provide enjoyable single player experiences if that's what you're into.
Get a bundle with Kinect. It may not change your life, but there are a few great Kinect experiences that shouldn't be missed by any gamer (Kinect Sports, Gunstringer, Double Fine Happy Action Theater, Dance Central 2, Child of Eden).
Indie Games: I've had a lot of fun experimenting with the Xbox Indie Games Channel. Lots of crap on there, but also some true gems. With a little internet research (right here on Giantbomb too) you can drop only a few dollars for some great gaming experiences.
If they want to do away with used games sales, or at least make a big dent, give us more incentives to buy digital versions that can''t be resold. Price the digital version cheaper than the retail product, and release the games on demand version the same day as the retail release.