I just bought a 5930K + MSI X99A Raider motherboard mainly because of a pricing error where the motherboard ended up costing me nothing, so it ended up being cheaper than a 5820K combo therefore I jumped on it. Actually it ended up being cheaper than a Microcenter combo which is super rare for Canada

it took a while to arrive (TD sucks!) but I finally got my parts.
With the 6700K pricing it makes little sense to pick that plus a Z10 over a 6 core processor with a solid upgrade path. Game engine developers are finally taking advantage of more cores so the Skylake looks less attractive. It needs to be a few hundred less to be worth it. The 4790K is a much better value given the speed differences and we need more than one game to prove otherwise.
I'm really as bothered by the 40 lanes but it's nice to know that I can dedicate 32 lanes to SLI/Xfire and have 8 left over for an insanely fast M.2 PCIE SSD. Also who knows with the next gen cards coming out next year on how much bandwidth they'll need? Everyone's aiming for 4K gaming so we may start seeing bottlenecks on the PCI bus. Also I love the fact that I can drop an 8-10 core broadwell / skylake processor in this motherboard in a few years if need be. You just don't get that type of upgrade path with Intel's regular consume sockets.
A lot of the X99 boards have all the bells and whistles the Z10 boards have or more (USB 3.1, M.2 PCIe, extra RAM slots etc) so I really see no advantage (other than maybe low power ITX builds?) for current 1151 Skylake at current prices.