And why were they being heralded as such? Because they said they were looking to continue to support the PC platform going forward... and now they have done a u-turn. Comprende?
Comprende plenty, they're still making their PC exclusive title and their other franchises are still going to be released on the PC.
The PC has never been a big platform for fighting games, SFIV is pretty much the only one to ever make it 'big' but it still gained pathetic profits in comparison to its console counterparts so they ditched it. It's common business sense yet some treat it as if its some kind of personal insult or a conspiracy to kill PC gaming.
It didn't sell well, be that due to piracy or not its common sense to discontinue it, get over it (this is angled at all those getting up in arms, not you

Yes because your average joe cant or wont mod their 360 to enable piracy.
And because it's still impossible to pirate games on the PS3. It was briefly possible, but Sony patched that up within a week afaik.