I literally just tweeted about this today in great detail and talked about it in another thread. My idea is different than your by a little bit, though.
I think the Switch is the first device. I think that eventually, they may release two other "sibling" devices at part of the same ecosystem. One called the Switch Pro, and one called the Switch Lite.
The Switch Pro is Nintendo's traditional console. What it essentially is is Nintendo selling the dock as a stand-alone unit. Instead of selling the dock with the Switch unit, all of the computational guts will be inside of the dock and it will be sold with a Switch Pro Controller instead. Because it doesn't have the tablet Switch unit, it will have a card slot built into the dock itself. So you just put your game cards into the Switch Pro, and play the games like a regular console. Because the Switch Pro still has a dock, owners of the original Switch can just dock their Switch's into the Switch Pro and have it function the same as a normal Switch dock would.
Then there is the Switch Lite, which is an undockable handheld Switch permanent buttons instead of Joy-Cons. It will be the size of a typical smart phone, and will predictably also have a card slot. Aside from that, I think you'll have a Switch XL and a Switch Lite XL (weird) which are just bigger versions of the those for people without baby hands.
All in all, I think that the Switch Pro will be their high end, the Switch will be their mid-tier and most popular, and the Switch Lite will be their low end. Their Mac Pro, MacBook/iPad, and iPhone respectively. There's also reason to believe they they will only make my Switch Lite idea, because they view the Switch as the high end, but my idea helps me sleep better at night so I'm sticking with it.







