Demand Up, Price Down

So, after giving today's lesson in Elders Quorum about how we shouldn't seek happiness through the consumption of goods, I'm researching HDTVs. I came across this website which explains the advantages and disadvantages of DLPs and LCDs. Having explaining all the advantages of DLP TVs the author of the article concludes:

Therefore, we expect this technology to gain in popularity. This increase in demand will drive the price down and provide even more of an advantage over other options.

The author might know something about TVs, but apparently s/he doesn't know much about the law of demand.