Add a stylus, a 3D screen, and have the screen fold over on itself. Call it the "3DS" for short.
A Switch with two screens: one that can plug into the TV, and one on your controller. Wow! So cool! Makes you go "weeyoo!!!"
Do you miss the days when characters in a game would tell you to take a break after playing for too long? We've disposed of the hints: now, your device will simply shut down after 90 minutes of play, and be unable to be turned on again until 30 minutes have passed. (There's an auto-save function, but it's not default! Oops!)
Leveling up the achievement grind by having your Switch installed with a 3D printer that spits out physical trophies when you achieve stuff in-game. Now you can not only waste your time, but the space in your home as well!
A Switch where the games, once inserted, dissolve - the data absorbed into the device. No more sharing games or selling them secondhand: you HAVE to buy them new! On the other hand, saves storage space! Too bad you don't have any 3D achievement trophies to fill those empty shelves...