And for those unaware, the three stretch goals discussed are:
Ports
HD assets
Extra scenarios from the ps3/vita version
My bet is that they managed to cover for the HD assets and extra scenarios, no ports just yet.
If those are the three, I'd agree that those two are the most likely ones, since they sound like the cheaper stretch goals.
I really hope we get that Vita port. There's just something about playing a VN on a Vita that makes the whole experience so much more comfortable and enjoyable.