Well, a DVD is only going to have about 1/4 the resolution of a BluRay or hi-def video no matter what you do with it. What your DVD player or or HDTV does to create that extra resolution will have much more effect on what you see than anything your DVD authoring program does. (I'm not sure what your Mac is doing, but it still only creates a standard DV image that TV has to compensate for.)
The best solution is to use a DVD player that has an HDMI upconverter built into it. (They're surprisingly affordable.) HDMI upconverters create the illusion of higher definition from your DVDs, and many people are so happy with the results that they prefer them to added expense of a BluRay players and discs.
I'll check out those DVD players, Steve. At the moment I'm still using a model that's several years old.
I made a test DVD of a short piece of footage of trees to which I had applied the antialias filter in PE. On our HD TV it looked blurry, of course, but at least there were none of those "vertical strokes" artifacts in the foliage. If the antialias effect could have been pulled back a little, so that it was just a very light antialias effect, it would have looked just right.
I googled this and there are codecs that apply a light blur, but they're top-end pro stuff and cost the earth.
Ahaaa! Steve, I just discovered that Virtual Dub can apply various filters to files when saving them as .AVIs. One of the filters applies the lightest possible Gaussian blur. When those films are played with a standard DVD player, on a high-definition LCD TV, they look nice and soft, without those brittle gritty video artifacts.
Distant details are quite soft, of course, but then that kind of gives the shot the impression of having a shorter depth of field, sort of. Medium to closeup shots retain more than enough detail to be perfectly acceptable, while looking quite smooth. The HD screen compensates just enough to restore detail without increasing video grittiness.
If I contrived to get an even shorter depth of field, and maybe added a speck here and there, it would be that elusive "film look" that everybody talks about.
Good old Virtual Dub. Love that program.