As someone with long term roadmaps for the tech industry, it makes it tremendously difficult to purchase a computer when you know exactly how much better the "next" model is. Don't have that problem here, and it seems like (baring some completely ridiculous change in battery technology) the 2016 model will be more iterative than fundamental.
Any concrete information otherwise?
My advice: buy the machine ASAP so you get the benefits now. These machines pay off best when you have a substantial daily commute, basically when your needs regularly maximize the machine's capabilities.
There will be depreciation but you'll also cut your maintenance and consumables budget. The usual economic model indicates that they fully pay off after 60-75k miles, but that doesn't account for time spent. Also, these machines are fun, and you should not delay fun if you don't need to.
That said, there are a few threads on this forum about specific development of: an L2 charger that fits in the tank bin, a Chademo plug that may be able to adapt to high voltage inputs, and the Vetter aerodynamic fairing. I want all of these on either my current 13DS or a 15/16 model if that supports it better.
For now, I have a great commuter and I'm promoting these things so there's a larger market that will support touring,