Those consoles already existed, the Wii and Wii U, Nintendo moved away from the whole idea. It's a good idea in theory but it didn't catch on and realistically kids just aren't a big enough market to concentrate on in the context of gaming, the average gamer is in their 30's and has a ton of disposable income, those are who the console manufacturers are targetting. If you do want a console for kids, well the Switch exists...