W10 as sooner or later, you will have to make the switch. Also, the store in w10 is more prominent and I think more people will be willing to use apps because they ate windowed. Finally, given the good reviews of w10 and the fact that it is free, I expect high adaption rate.
Ps. I am mainly talking about desktop/laptop/tablet version. If you are talking about the mobile version and need income very soon, I would target 8.1 for now as we don't know how long it will take for people to migrate especially if carriers are involved.
07-28-2015 01:24 PM