To all of those who don't know, The Elder Scrolls Online won't have a required subscription system starting June 9th, 2015. On that day, the PS4 and XBox One editions of ESO will release, branded as "The Elder Scrolls Online: Tamriel Unlimited."

This means that you have to buy the game only once starting from that date to play it. However, if you have any remaining subscription time on June 9th, that gets converted into extra time for the new premium membership option that will be added. This will give you:
  • An allotment of crowns to spend in the new in-game Crown Store based on your membership period (more below)
  • Access to all of ESO’s downloadable content (or DLC) game packs for the duration of your membership
  • A 10% bonus to XP and gold gain, crafting research, and inspiration


So that sounds fun! You can read more news about this pretty critical change in the ESO Announcements:
https://www.elderscrollsonline.com/en...ium-membership
https://www.elderscrollsonline.com/en...soles-june-9th