I'm sorry that a touchscreen macbook didn't happen for ya, I however am particularly happy that they have not gone down that road. Fingerprints on my screen drive me nuts.
Ergonomically touching a screen attached to your portable computer is bad news for your wrists.. detaching a touchscreen would solve this... kinda.. the issue though would come from the mechanism handling the devices detachability, with both reliability and elegance/esthetics being a major concern(how many Apple devices do you know about, that aren't cases, styluses, or wrist bands, that ARE designed to be "detachable"?).
A Macbook(Any variant.. Air, Pro etc..) wouldn't be a Macbook with a touch screen IMO.
iPads are clearly being maneuvered into this market and that is most likely where you will see the closest comparable equivalent of what you are looking for.