My guess is you won't see it until HD put the 103 in all of their touring bikes as oem. Also I think it will show up in a CVO first before they roll it out into other bikes. My WAG is 2013 the bike's 110th b-day.
I really hope they keep making Harley's air-cooled. They make me feel nostalgic and like they are "simpler". That is as long as the EPA police don't make it illegal to use engine tuners etc. I know SEMA is fighting that tooth and nail. One problem is, a lot of consumers are complaining to Harley about the lean running and heat etc. not realizing that that is being done so that at least we can still buy an air-cooled motorcycle.
FYI tuners have been illeagal for many years......they are for offroad/race use only
It will eventually happen, has too! And i would have now problem going down to the shop and buying one when im ichin for a new ride. It will be ok. Harley will still be harley, and maybe all the cry-babies who complain about the heat will stop already.
Although it was before my ownership time, I've heard many Harley owners complained when MOCO moved away from the drive chain and move to the drive belt. Water cooling is coming...probably along with bunch more horsepower....