It is clear to me that while the Switch is a decent enough stab at a quasi-mobile home console, it doesn't truly fit into my view of a portable/handheld. There is no way I'm lugging that thing around with me daily. I wouldn't ever play it on the bus or take it into the office to play during lunch (size and reportedly poor battery life are the sticking points).
These days, I'm much more into what Nintendo does with their handhelds (owned a 3DS XL and New 3DS XL - No Wii or Wii U), so honestly, I would like them to go down this route. For the sake of their developers, a Switch Mini with better battery life that can play all Switch games (albeit in the undocked fidelity) in holiday 2018 is probably the potential solution that I like best.
I think that holiday 2018 is when they'll actually be able to pick up steam with a Switch mini. I preordered a Switch but as far as I'm concerned it's not really ready for the mainstream and it won't be until it manages to become cheap enough and small enough to be the 3DS's successor.
In other words, I don't think Nintendo see the Switch in its current form as the product that will sell Wii levels because they're kind of still investing in building the platform at the moment so that they can have a wide breadth of quality, desirable titles that work on this architecture as it gets cheaper to produce. They can then flood the market with a variety of form factors at competitive prices that people will actually buy. This is why they're not selling the system at a loss, to minimize its damage to their profits (unlike the Wii U and the 3DS in its early years) during this investment process, and the money made from those who still buy the 3DS and its software or from those who buy the (expensive) Switch and its (expensive) accessories in its current form will help build the platform further.
At least, I hope this is the case and that it's not Nintendo just being incompetent, but seeing as this was planned out by Iwata before he died I think its safe to assume that any 3DS successor we see will pretty much just be a Switch mini and that the platform as a whole will have a 3DS style relaunch next year.
So in the end we will end up with 3 SKUs
Switch with Dock and JoyCons and Grip - $250
Switch with JoyCons but no Dock - $200
Switch Mini, controls not detachable- $170
I think down the line we could see something like:
Switch with Joy-Cons, a 1080p screen and power that runs in docked mode at all times, and a Google VR/Daydream like headset, No Dock - $299
Switch with Joy-Cons, Dock, and a Grip - $250
Switch Mini with controls not detachable - $200
Switch TV box with Pro Controller - $150