I suspect we previous owners wishing to upgrade our bikes via parts will not have access to them in any significant number given how hard it is to get parts for existing bikes as it is >_<
You know how the world of new technologies works, Burton. You buy something this year, it's better and cheaper next year.
Actually, I'm feeling very gratified right now by my decision to buy last year. There are incremental improvements in the SR this year, but nothing revolutionary, unlike the year before when the SR was introduced as a clear advancement over the S. Sure, ABS would be nice, name-brand components would be cool, but I'm perfectly happy that I bought last year and already have 7000 miles on my bike, probably 10,000 or more before the 2015 is actually available. Honestly, I got lucky, but I feel like my timing was perfect.