Agree 2014 will just see minor changes. I think, in part, depends on how BMW as a whole is doing.
The past few years have been very rough, so I was surprised to see such dramatic updates to the '12 bike.
I hope you feel better soon. It's smart to wait and stay off a bike until your medical issues have cleared up. I've ridden with some pretty serious medical issues in the past; it wasn't smart.
Get well soon. The S1/HP4, in whatever form it takes on, will be waiting for you. If it remains the same, it's still one of the best platforms ever made, if not the best sportbike ever made.