You are in a sense right, but the technology hasn't advanced that far to take advantage of those HDMI cables that have a higher bandwith.
Please for the love of God, don't pay more than $10 for an HDMI cable. Go to monoprice.com and save a lot of money.
I can't find the article right now that compared HDMI cables of all different types of quality. The cables were tested with diagnostic equipment and the cables varied in length from 3' to 100' and the equipment could not detect a difference between a $5 cable and a $300 Monster Cable. Don't believe the hype. Here's a little article from PCWorld to educate people on the basics of digital cables:
PCWORLD
Blu-Ray is far from outdated. Digital distribution is a long ways off from giving consumers a true HD experience, that is Video + Audio. A bluray disc is 50GB of data. If you want to watch a movie of equal quality, you'll have to buffer it for a week before you'd get a stable streaming picture. The crap that Netflix streams is hard to watch on a 15" monitor, how the hell is that gonna look on my 50" plasma?
Blu-Ray is an amazing format. I do refuse to rebuy my old DVD collection on Bluray though. The studios have already gotten my money once, I won't give it to them again just for a new format. I do only buy new releases on Bluray now. The prices need to come down, but I only buy them from Amazon or Walmart if they have the discs for the same price in the store. As soon as I can get my new release blurays for $20, I'll be a happy camper.