Here's my pitch, wacky as ever.
release a hybrid handheld/home console during holiday 2016. Include HDMI so that it can be used on any HDTV and a micro USB charging so any phone charger will do. Put in about 16GB-32GB storage (which should be $8 or so by 2016) and a MicroSD card slot.
-A Multi-touch screen, 1280x720 or 1136x640 that is also a foldable LCD screen. This enables a big 5 inch + screen to be condensed into a small, DS Lite compact unit. The unit can have two clamshell parts (one housing battery, motherboard, buttons, etc) and since the screen folds we retain the DS Lite shape with tablet-esque screens. Phones are already doing this and a screen like this should be pretty cheap by 2016
-Phones next year, targeted at the $300-$400 range (think Samsung Galaxy S5) will debut 16-Core ARM CPUs @3Ghz. Pack something like that into this bad buy and couple it with ARM's latest 16-core Mali GPU that clocks near 800Mhz, getting near Xbox One graphics performance.
-Throw in 8GB RAM and a Wii U Pro like controller for when users play on their HDTVs
-A decent battery, possibly a big one or maybe two due to the unit having a foldable screen.
- A similar button layout like the 2DS, think vertically when opened. Add ZL/ZR shoulder buttons on the back like the Wii U game pad
That's just my idea for what Nintendo should do next gen, I could see all of this fitting into a nice $199-$299 package in 2016-2017. But not everyone will like this idea, what's your idea on what they should do?