The engine (electric) for when I'm in a real hurry and to drive itself home if someone steals it.

I'd like a rear view display on the handlebars or heads-up in the sunglasses. Almost there now, but not quite with functionality and price. I'd also like it to have intelligence to warn me if an approaching vehicle is erratic, distracted, or aggressive.

Tires that last as long as auto tires but soft enough to be worth riding.

Body air bags, but only unobtrusive. Less bulky than that Hövding for example.

If I bought into electronic shifting, I'd want it smart enough to decide when to shift. There are enough clues in body positioning and power output IMO, so what's the holdup?

Hologram tech to make my bike look at least massive enough to damage a motor vehicle.

Improved drag coefficient.