There was me, priding myself on applying the elusive Monty Hall conditional probability math to "Deal or No Deal" TV show and thinking how clever I was to integrate DVD, touchscreen, and LCD Television for a snazzy new tourism presentation. WRONG and WRONG was I, since it appears the math on Deal no Deal is NOT Montyfied, and the DVD touchscreen solution remains elusive.
Circuit City was very helpful figuring out the challenges and I learned that running DVD through a computer using the normal VGA outputs will give crappy picture. The video is very high quality and keeping it that way is a priority. Surprisingly to me, even with a hyped up graphics card and DVI output I may not get great quality on a 42" LCD TV. The TV dude said that this is from incompatibilities in digital standards and helps explain why media center technology (much hyped by Microsoft at MIX06) is NOT taking off very well.
The problem is I need to interface with a touchscreen so the users control the presentation on the touchscreen but can also view it on the 42" LCD TV above. The solution appears to be to get a touchscreen capable DVD player (which I did not know until today existed) and then hopefully be able to output from it to touchscreen AND the LCD TV. If this fails it's back to the DVI PC solution.