ZeniMax's latest website notice. It's probably more accurate to say that criminality is coming to Tamriel, though. More specifically, Elder Scrolls Online's upcoming Update 6 features the justice system which will enable your avatar to participate in a variety of underhanded activities including murder and thievery.
The latter involves relieving hapless NPCs of their valuables while avoiding those pesky town guards, and the former involves assaulting and even killing AI citizens. At some point you'll end up with a bounty on your head, which in turns affects how guards react to your presence. Click through the links below to read the rest of the details.