Well, I was waiting for it, and now Shimano just announced it a couple hours ago.
New XTR with 10sp double and triple cranks, new hydraulic brakes, and a new tubeless wheel system.
p> It looks like Shimano will pursue both 2×10 drivetrains for XC and 3×10 for “trail” riding. The new crank design seems understated compared to previous offerings. Cassettes will be in either 11-34 or 11-36 offerings, with an updated “Shadow-type” rear derailleur. Pretty hot.