Does such a thing exist?

I'm talking about a basic cycle computer where the display is on a watch rather than on your bar. I've no interest in heart rate montitoring.
Perhaps one of those GPS Forerunner things would do the job?

Any ideas/thoughts/recommendations/insults ?

cheers.

Suunto T3, I've got one that I use for cardio work at the gym, you can get a GPS unit and pod for a bike.

HERE

Main feature is heartrate and training zones which is very good.

as you said – maybe a Garmin Forerunner or ..

CicloSport HAC 5, Polar CS300 etc