The Ubihate is strong with some people.
I admit that AC4 had badly optimized PC version - it lacked triple buffering so to get 60fps I had to get D3D Overrider, and even then it was very demanding. But aside from optimization, PC version was fantastic.
Ghost Recon Future Soldier had similar HW optimization issues so I had to turn some settings down, but 1080p/60fps was achievable, and apart from that, it was a good PC version.
AC 1/2/3/Rev/Brotherhood were all running great on my PC. So were FarCry 1/2/3. So was Beyond good and Evil. So were all 5 Prince of Persia games. So was Lost. So did all Brothers in Arms games. All three Call of Juarez games, fantastic on PC. Dark Messiah, ditto. Heroes of Might and Magic, Might and Magic X, all Rayman games, all Splinter Cell games - fantastic on PC!
Seriously, Ubisoft is not perfect, some games do not run perfectly, but vast majority of ubisoft PC games is absolutely running great and the hate they get is irrational. And unlike some other companies, Ubisoft actually releases pretty much all their games on PC.
So I am perfectly willing to give them benefit of the doubt when it comes to Watch Dogs. Already preordered did for 28 dollars on Origin. My 2500K + 280X combo will handle the game just fine at 1080p/60fps at great details I am sure. I do not need 16*MSAA and similar useless powerhungry features.