Some HDTVs do better SD than others. To a great extent, you get what you pay for.
With many cable systems that are trying to transition to digital, their SD offerings are poor at best. A really good HDTV may be able to smooth it out. Better HDTVs make a better effort a cleaning up the artifacts of SD programming.
The SD TiVos are going to look worse unless you turn up the quality but they'll obviously never be any better than the source signal. The RF modulators aren't helping either.
With many cable systems that are trying to transition to digital, their SD offerings are poor at best. A really good HDTV may be able to smooth it out. Better HDTVs make a better effort a cleaning up the artifacts of SD programming.
The SD TiVos are going to look worse unless you turn up the quality but they'll obviously never be any better than the source signal. The RF modulators aren't helping either.