This question struck my head when I was thinking sitting on bed that Surface is a brand of Tablets and Lumia is for Phones. So Its possible that we going see a Intel powered Lumia instead Surface Phone.
But if it happens then personally I think it'll not hit as it should, because the name factor will working. Lumia becomes a non-popular hated brand. So they should make Surface Phone lineup.
But if it happens then personally I think it'll not hit as it should, because the name factor will working. Lumia becomes a non-popular hated brand. So they should make Surface Phone lineup.