In reality, this breakthrough is a huge wow in genetics.
In mice, it might help the study of paternal/X-linked mutations that would otherwise be harder to study in the presence of the maternal X chromosome.
However, it's still a long way to go before gay couples can say that they can finally have kids of their own.
In short, the process is like this:
1% of Father-1 (XY) stem cells lose Y chromosome: XO cells
XO cells give rise to XO mice (female)
XO mice mate with Father-2 (XY) to give normal female/male mice (XX/XY)
So yes, you still need an intermediate, and if you put it in human perspective, its incest. To top it off, in humans, XO individuals display Turner Syndrome which results in females with lots of health complications and likely to be sterile. So yeah =/