Bethesda swore they weren't going to talk about it. The official sequel to Skyrim was supposedly so far away that they couldn't even conceive of talking about it. Turns out, that was at least a little bit misleading.
The Elder Scrolls VI has been confirmed to be in the works by Todd Howard himself. The trailer rolled quickly and unexpectedly after the closing reveal of Starfield, an upcoming sci-fi adventure set in a completely new IP. We don't see much, but we can glimpse the general landscape - hills, valleys, mountains, and a roaring sea in the distance. The brief look at the new lands waiting to be discovered heralded by the blaring of the familiar, remixed tones of the Elder Scrolls theme.
It's exciting, interesting to speculate on, but that's about it. No concrete information is known about The Elder Scrolls VI, but we won't be learning more until next year. In fact, it's very likely that we won't be seeing VI on store shelves until 2020. Still, that's one heck of a way to close an E3 press conference.