Juts came across this thread, and I'm in need of a new machine. My SP4 is great, but I'm starting to work more outside of the office and I'm finding the SP4 to be less than optimal for long-form writing. So, I'm looking for a more traditional notebook form factor, and of course the SB is my first choice. And, I need the tax write-off, and so purchasing in 2016 would be best.
Of course, the idea of buying one now with the possibility of a spring release of the SB2 is daunting. It's hard to imagine that they'd release the SB2 so soon after Performance Base, and I do think waiting for Kaby Lake kinks to be worked out would be smart--and so a part of me thinks SB2 is more likely at 2017's October event.
I'd probably pop for a SB with Performance Base now, but man, it's a tough decision. Of course, one could also argue that it takes Microsoft six months to work out the bugs, and so it probably wouldn't make sense to buy an SB2 immediately in any case.
Grrr... There's just not another notebook that has the 3:2 screen format I've grown to love as a writer.