Bruto,
Thanks for pointing out that MTBR thread to me. Just what I was looking for!
I don't mind buying the hubs for boost. What bothers me is that the wheels wouldn't be interchangeable with all my other wheels, which are currently able to switch between my other bikes (QR, Thru-Axle, XD driver body, Shimano driver body). It looks like 3 mm spacers on each side of a 142mm rear hub, and at the disc mounting surface could take care of the problem. The only question would be how the chainline/tire clearance works out.