TAAATS (EUROCAT) was optioned with an on-screen weather radar overlay, but it was a bit kludgy and tended to hide the aircraft returns. It was shown to us in the SIM and the Centre in the early days. There was also an interpretation problem because the controller had no knowledge of the beam angle, etc, hence no real idea of tops, etc. I think it was traded for a better quality mouse pad, or some-such.