Electronic shifting is already the norm on bikes $5,000+. Shimano is about to introduce an electronic version of their 105 groupset, which will probably normalize electronic shifting on bikes in the $2,000+ price range. Electronic Tiagra and Sora are probably less than a decade away, which will drive that number even lower.
I wouldn't mind it if ultegra/dura ace also came w/ a mechanical option. But to completely d/c mechanical w/ the latest flagship groups and not provide an option? that's harsh...
