Ubisoft has not been particularly friendly with PC gamers in recent years. DRM is one thing, but also in regards to proper game support. Delaying PC version until well after console releases, and across the board poor control schemes from Assassin's Creed to From Dust. So it's quite disheartening to hear the creative director of Assassin's Creed 3 promise PC support, but not the platform's keyboard and mouse control scheme.
"We're definitely supporting PC, we love PC, but I think it'll be PC with a controller. I don't see us investing hugely in a mouse and keyboard setup. I think if you want to play on PC and you want to play Assassin's Creed, you have a controller."
There was a time when PC versions led multiplatform titles. As a console gamer, it could be unforgivably frustrating figuring out the control scheme for your new game. Imagine purchasing StarCraft on your Nintendo 64, and then imagine if the developers decided it wasn't worth investing in a proper scheme for your controller. You might feel like you wasted your money, you might feel insulted, or you might bear down and hope your support of the franchise would mean the franchise would eventually support you.
Now the times have changed and consoles typically lead multiplatform titles, and PCs receive the ports. This similarly leads to extremely poor control schemes in many games. Some developers, like Borderlands studio Gearbox, actually apologize for their controls and promise proper support in their sequels. Others promise support, but are found lacking.
Assassin's Creed III is Ubisoft's opportunity to make up a lot of lost ground with PC players. It appears their intentions are promising, but the proof is in the pudding. Does Ubisoft truly understand what PC gamers want?