Upgrade path? Tell that to any early adopter of Haswell, 2 years ago, and see what happened with Broadwell (Beginning the day that Intel announced that old 8-Series Chipsets would not support it). They will be rolling on the floor laughning since the initial launch platform has nowhere to go, even today. Only useful upgrade would have been going from a low end Celeron/Pentium to a Core i5/i7.
Anyone that wants to purchase Skylake not for what it is, but because they think it will be possible to upgrade it in the future, may as well play Russian Roullette with all the chambers loaded. Since Intel totally screwed up the "upgrade path" in LGA 1150, you must have some real faith to trust them, specially considering Kaby Lake announcement, which signals serious node issues. The world is literarily crumbling, so forget about solid upgrade paths on Intel platforms.