this is a bit of a hypothetical to say the least.
I mainly longhaul with VS
which has PTV's on every seat, or BA
which has both PTV's and frequency.
I could fly non-PTV airlines from the UK, say Delta, Northwest etc, but why should I?
gotta keep my flyclub miles up with VS
shorthaul is a different matter, and i can live without it, but then in the UK you dont have any shorthauls (correct me if I'm wrong) that offer PTV.
So shorthaul we get frequency (much more important for shorthaul, less so for longhaul) and no PTV's!