Right, I have only thunderbolt 2, so no way to connect this....or?

i dont think this is for the "now". with ryzen/sky and vega/volta, we will see more power coming with same/lower tdp. so something like a zen 6C/12T in a laptop, and a gtx1170 externally, would mean i could get rid of the tower and still play games (without carrying a "20lbs" gaming laptop)..