.Hack porting to PC runs at 60fps with little problems. Yet the original games (which came out not that long after Shenmue, pretty much same generation) ran at unstable 30fps.
The 30>60 porting is not easy, but it's totally doable. Lol at people claiming it would take 70million $ just for that. It would surely be a complex thing but a lot of people here are greatly overestimating it.
With that said and with me being a great 60fps fan, I don't really see the necessity for Shenmue to run at 60fps as long as they give us stable and fluid 30fps.
I'm more concerned for the lack of 16:9. Having 4:3 just in cut-scenes it's ok I guess, but for the whole game it would be ridiculous.