I have a Sony 32" widescreen with DRC (100Hz). The DRC thing does some clever trickery to increase the resolution of the picture so the number of pixels on each axis is doubled IIRC. Phillips have Pixel+ which is similar.
All I can say is the picture is very sharp and detailed, many of my mates who have watched it have commented.
The main thing with 100Hz tellys is the incoming analogue signal is captured digitally, then processed, before being feed to the screen at a higher scan rate and sometimes higher definition. On early sets the processing power was quite up to scratch so on some fast moving stuff, e.g. football, objects would sometimes get a bit blurred giving a sfot picture.
More recent 100Hz tellys have a lot more processing power and this problem seems to have been pretty much sorted.
Make sure you feed it RGB signals from the digi-box, PS2, XBOX etc (via a fully wired SCART) for the best possible picture.