Shimano have got their electronic gear shifting wizardry on the market (for a price), and have hinted at XTR going that way also. There's a hydraulic system on the market (for a real price - could get a bike for that!).
Question is - what does it do that a conventional shifting system doesn't? I can only see downsides (heavier, more expensive, reliability, limited lifespan, needs charging), so why is it "better"?
Or is it just new and exciting?
I can't see what possibilities it opens up either (predictive shifting when connected to a GPS? Why would I want that then?).