Here's a breakdown of the new content for the Elder Scrolls that we learned through E3 2017.
Firstly - there are some new DLCs that will be coming out shortly for The Elder Scrolls Online.
Namely, these are Horns of the Reach (what should be a dungeon-based DLC set in Skyrim, and The Elder Scrolls Online: Clockwork City - a full DLC chapter likely expanding upon what already occurs in Clockwork City in The Elder Scrolls Online: Morrowind.
There will also be Paid Mods that can be bought and used for PC/Xbox One/PS4 - bought using credits, rather than cash. (This is a re-attempt at what was previously tried on Steam).
Finally - The Elder Scrolls V: Skyrim for Nintendo Switch has been confirmed, and shown - and Amibos can be used (Link as the Last Dragonborn anymone?)