Elder Scrolls Online now boasts 8.5M players
Firor says that Elder Scrolls Online currently counts 8.5 million players across all platforms. This number reflects unique players, not concurrent subscribers (the game is buy-to-play with an optional sub). It does not count beta players or free weekend players, just people who've purchased the game outright, so it might more properly be termed "boxes sold."
Massively OP's ESO columnist, Larry Everett, was on hand at the event to clarify that the number is an update to the 7M number released last year.