Nintendo's next console, previously code-named NX, is now titled Nintendo Switch.
As Eurogamer reported back in July, Nintendo Switch is a portable console with detachable controllers, runs on cartridges and connects to your TV.
The trailer shows how you can switch play from the TV to a handheld base unit which snaps out of the main dock. A pair of detachable controllers can then connect to either side of the screen.
Switch's controller has a stand to prop up the device, a slot for the game cartridge and a headphone jack (take that iPhone 7).
Lifting the Switch console from its TV dock will transition gameplay to the screen. You can then attach the two mini controllers, named Joy-Cons. Either two can be attached or one can be held separately in each hand, or one can be held each by two players for local multiplayer. Multiple Switch consoles can be brought together for multiplayer via two screens.
A Nintendo Switch Pro Controller will also be available for players who prefer a more traditional controller.
The trailer shows off Zelda: Breath of the Wild, the one game we knew was coming to Nintendo Switch as well as Wii U, but also showcases Skyrim, an enhanced version of Mario Kart 8 (King Boo character and the ability to hold two items instead of just one), Splatoon and NBA 2K17.
A new Mario game is also shown, which looks similar in design to Super Mario 3D World.
Nintendo has also released a list of major third-party developers signed up to support Nintendo Switch, including EA, Activision, Ubisoft, Bethesda, Capcom, From Software, Konami, Platinum Games, Square Enix, Warner Bros., Atlus and Codemasters.
Separately, Nvidia has announced it is behind the Nintendo Switch's innards via a custom Tegra processor, as Eurogamer's Digital Foundry also reported back in July. If you want a recap of everything we know, read our guide to Nintendo Switch games, specs and much more.
Our video team have also been scouring the reveal trailer for details. Check out their findings in the video below.