"As I've mentioned, we have been (and will continue to be) steadily working on the Xbox One and PlayStation 4 versions of ESO," Firor said in a blog post. "They are playable and fun right now, but there's still some work to do before we can set an official launch date."
"First and foremost, we want to make sure that two of our most important systems still in development--the Justice and Champion Systems--are included in the console release," he added. "Those two systems will introduce a huge amount of content to the game, and we know everyone is looking forward to the new types of gameplay they provide."
Firor also stressed that the Xbox One and PS4 versions of The Elder Scrolls Online "are not just ports" of the existing PC and Mac editions, and as such, extra time is needed to ensure a solid experience.
"We have completely replaced the PC user interface with a console-specific UI designed from the ground-up with a controller and a living room play experience in mind," Firor said. "We've also added voice chat and full integration with XBL and PSN. Expect to see lots of news about our console versions in early 2015."
The console versions of The Elder Scrolls Online were initially expected to launch earlier this year alongside the PC/Mac edition, which arrived in April. However, in May, Bethesda announced a six-month delay. In an effort to "make it up to" fans holding out for the console version, Bethesda has revealed a special $20 upgrade offer--you can read more about it here.