It would be the same as the 3DS. You can even put 3DS games in it BUT it has a few new things.

1. You can watch Nintendo cartoons and anime on it. This feature is taken from a exclusive feature where on the wii in UK I was told had the Kirby Right Back At Ya anime on it.

2. TV Compatibility. It will be like the switch, a handheld that uses a port to be connected to the TV.

3. You could play Nintendo Switch games on it and 3DS games on it.

4. You could play Wii games on it too but only if you buy something to connect to the 4DS where you have a extra Wii joystick and Disc player.

5. You can watch DVDs on it (with the Discplayer I just mentioned).

6. Better Internet browsing.

7. The Weather channel comes back with even more state’s country’s and city’s and more.

8. Bring back food delivery from wii.

9. More street pass games.

10. Bring back a lot more wii channels like the Everybody Votes channels.

11. IPHONE 1-5 GAMES.

    MORE FEATURES AND PICTURES / DRAWINGS TO GO WITH IT SOON