The Golf Mat
thegolfmat.net, $229

You might not consider an artificial surface high-tech, but The Golf Mat simulates the feel of natural grass. Ordinarily when you hit on a mat, fat shots fly through the air almost as well as cleanly-struck shots because the clubhead bounces into the ball. But this mat bends and flexes when you hit down on the ball, so your results are much more like what you'll get on the course.