I was not going to originally comment in this vein but since a few users alluded to Live type capabilities, i will add this...
Just think ... Live 8 suite was >$800, had only 32 bit audio processing and was limited to a single display screen..yet sold in the boatloads!. (i mean wtf..lol). Clearly they are providing what the market needs, and needs so badly that they can charge a huge premium for what is otherwise an average DAW.
So to me, as a studio tool i think Live is so-so, and much less capable than Sonar x3, but Live pretty much dominates in every forum and user group i participate due solely to its live play capabilities.. so, whether we like it or not, those are the messages from the market and users... cos here is the rub.. if users HAVE to buy Ableton, the chances that they also buy Sonar, or keep upgrading Sonar are seriously less.
So +1 for gapless audio, improved audiosnap, improved matrix, a built in looper, 2 way controller communication so that i can use Launchpad with Matrix (and see the lights work), and anything else that lets Sonar be a real time live performance tool.