I'd buy HMH XBLA for myself and my favorite peeps in a heart beat if it ever comes to Steam. Loved the first. I've already bought the XBLA, but I don't have an Xbox to play it on, and it's too late in the cycle to buy a new one.
More Japanese games should come to Steam period, especially quality legacy titles. The polish and quality of some these ports is nothing short of a revelation to me. It feels like *this* is how they're meant to be played, no jank whatsoever*. Going back to the PSP/Vita for Ys7 and TitS now is going to be hard.
*(Well in the case of Falcom's titles, technically it was from the very beginning)