In just three and a half minutes Nintendo showed what company President Tatsumi Kimishima describes as "the core product". The big N, though, has been at pains to explain that more is coming to the system, and it's easy to see how that can be possible. Beyond key questions around the detail of that 'core' concept, the nature of the Joy-Con controllers, as one example, opens up broad possibilities for future add-ons and variations.

Speaking to Bloomberg, Kimishima-san suggested that an ecosystem will form around the core Switch concept, with plenty of ideas evidently in the works.

By no means was that everything [in the preview trailer]. [On the ecosystem] It may be appropriate to call them accessories. Or it might be better to call them add-on hardware. It's probably more correct to call them accessories. You can assume that there will be a wider array.

Kimishima-san also explained why footage was limited of games, and why they portrayed broader concepts rather than full game reveals.

One thing we still can't show is the software lineup. We want people to touch the device in January and experience the software for themselves.

Kimishima-san said he was "surprised" by the negative reaction that investors had to the Switch unveiling, though Nintendo's share value has recovered a little (though not fully) in the last two days. He was also asked about whether Switch would support hardware from other companies, and the talk shifted to Virtual Reality.

VR offers new ways of playing, but that depends on what kind of software can be played. If you ask us whether there are any possibilities, we can't say no. It may be that we will build VR software titles, I think that opportunity is available to us.

Some interesting, though typically ambiguous, comments. It'll be intriguing to see what else Nintendo has up its sleeves for the January unveiling.