Tested the 1299 myself this weekend. It is definitely a great package. My first takeaway and the biggest was easier "rideability". It took less effort to go fast. I don't really feel a difference in the ergonomics like some have mentioned, but I'm shaped a bit funny anyway!
I was not a fan of the semi-active suspension and never have been. Tested the 1000RR 2 years when deciding on the 1199 and didn't like BMW's either.
Looks are pretty much the same. I don't like the new tail, but everything else pretty much looks identical to the casual viewer.
Power for me wasn't a huge differentiator. The 1299 was smoother through the range, but having a full Termi exhaust/Rapidbike EVO w/custom tune/ & MWR I have been spoiled and am probably making more power than the 1299. And talking to one of the 12 Master Ducati techs in the US, he told me quite a bit of the 1299 midrange power increase came from extensive remapping of the ECU combined with the 60mm exhaust. Going even more over square than the 1199 did not lend itself naturally to more midrange. Power figures above 8k are identical.
Bottom line is I love the Tricolore scheme. I have had it on the 1098 and 1198 and I like to have the unique factor. I have still yet to see a Tricolore 1098/1198 or 1199 on the street and I like that.
Just my .02 to you "on the fencers"
So, no change for me for another 3 years or so. Who knows what Bologna has up their sleeve next...