I'm more inclined to agree that Street Fighter in general is just not a PC game. That said, since Capcom already brought SFIV to PC refusing to expand on it, as with its console counterparts, is a shitty move to all the players who did buy it for PC. It sucks since Capcom basically left the PC players they've drawn hanging. If I had bought SFIV for PC I would have been pretty ticked.
Honestly, I was abit surprised when SFIV was first announced to be coming to PC. Same with DMC4 and a bunch of the other Capcom titles. The worst part is that they bring one or two titles from a franchise and then ditch it completely. I'm not a fan of Lost Planet but I find it odd that they brought it to PC and even re-released Colonies Edition, then they refused to bring Lost Planet 2. Even stranger (to me anyway) is when they bring sequels from consoles to PC, as with DMC, they only released DMC3 and DMC4 to PC.
By contrast, Square-Enix have been experimenting with PC as a potential venue with new IP's, such as Last Remnant, without breaking the consistency with other established franchises. They also focus on the PC's most dominant genre, MMO, with their Final Fantasy Online series (FFXI and FFXIV).