Phil,
I've never heard of a transflective touchscreen. A transflector needs
to be mounted on the rear of the displar, not on the front. In the
reflective mode they allow light that has passed through the to be
reflected back out. In the transmissive mode they allow light from a
back light to pass through the transflector. If you mounted it on the
front it would probably make the display harder to read, due to light
losses. It would also probably have lots of glare problems as well.
Most manufacturers overcome the poor performance in bright lighting by
having a very bright back light on all the time, they dim it for night
usage.

John