A very good question. Impossible to answer until it shows up on Ark, but Ark currently does not list any kind of "v5" Xeon CPU, nor any notebook CPU bearing the Xeon branding, so all we have is this blog.
Unfortunately, I'm kinda really doubting it. Gut instinct is saying that the AVX-512 thing is Intel trying to keep companies doing high end data crunching buying their many-cored xeons. Given the performance boost that the features are going to give, it's not inconceivable that Intel doesn't want people buying their cheap quad core chips instead of a pair of their more expensive 8+ core Xeons.
They'll also need to drop some to developer systems. Then again, I'll probably get a brand new workstation when new AVX-512 Skylake Xeons arrive. Intel SDE emulator is goes only so far...
