They've done the polished and black the wrong way round on those. They wont look like that for long.
11-46 XT cassette should be nice, albeit with two alu cogs. DI2 still too pricey to bash off rocks for my wallet. Interested to see how much the SLX 11 speed cassette will cost/weigh.
http://cycle.shimano-eu.com/componentsofadventure/en/
XT Di2 announced. (also 11 spd SLX)
Might actually upgrade my Tallboy LTC now. £350+ for a smashed XTR Di2 Mech has not appealed to me greatly. Should be a lot more affordable.
Edit: more info at Pinkbike incl. pricing - http://www.pinkbike.com/news/shimano-launches-new-11-speed-slx-groupset-and-xt-goes-di2.html