Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

The ABS idea is really interesting tho.
There've been a few "ABS" systems for bicycles but none have come into mass production.

This one is quite interesting - although all the ones I have seen work on the same principle.
http://www.treehugger.com/bikes/slidepad-regenerative-abs-braking-for-bicycles.html

I read about the concept in the very old 'Bicycling Science' book; all these modern versions seem to have used it as their inspiration. According to the book the original system was tested so many times that the fork crown snapped, and not once did someone go over the handlebars.

Although it does mean you can't balance braking between front and rear on slippery surfaces or do awesome skids. Plus if your single lever/cable breaks you don't have an alternative.