This is highly unlikely but u can get a 6tf+ console right now if u want it http://www.overclock3d.net/articles/gpu_displays/colorful_show_off_an_intel_skylake_motherboard_with_a_built_in_gtx_1070_gpu/1
Est cost with i5 would be over $450 when in bulk .. Unless intel and nvidia actually want console share then it could be $350 so total price would likely be $600 .. Ms could sell a $599 7tf console right now if they wanted .. Xbox pro?
Personally i think xbox will be zen 6tf in may next year for $499.
Microsoft would have a custom chip based on an existing one made with their deal with AMD. Just like Sony.
And they don't buy parts for retail cost.