I might be missing something, but why wouldn't it be in the discussion? BR will also die, and may in fact might (maybe likely) before DVD depending on how quickly downloads ramp up. Add to the content question (films just getting to DVD, that may never to BR), prices, collectors (as most content needs to be relicensed, there will be video extras, booklets, etc. that change/are eliminated in future releases and there's a movement to collect current versions), and most people likely not replacing titles they already own, DVDs are going nowhere soon. In fact a cleaned-up Criterion DVD could conceivably be a superior experience than a Fox Blu-ray.
How is this different than redbook discussions of SACD/DVD-A players (and we know how that turned out)?