Anyone who buys a TV in the next five years is going to buy an HD set. Many of those will be 1080p. Most will be 42" or larger.
I wonder what percentage of people who have any intention of buying a next-gen console have an HD set or intend to get one in the next year or two, rather than percentage of consumers in general.
The number one thing that drives consumers is price. It took dvd's about 6-7 years to become standard after it was clear that was going to be the format of choice. It takes that long to usher in new tech because a large portion of consumers dont buy fancy technology until their current setups crap out. Then they get the most fancy setup they can get based on price.
With dvd's and dvd players it took so long to become standard because the prices had to fall to where your average consumer felt it was a worthy purchase. I spent 600 on a dvd player when they were all the rage because im a tech geek like most here. But my family stuck with VHS until they saw a $99 dollar player at a Sams Club. Now my folks make good money, but they didnt consider the change in format until it was so cheap that it was stupid not to do so.
Thats what HD faces. Entry level HD sets that are big enough for a tv room (37"-42") still cost around 1200-1500. Your average consumer isnt dropping over grand for a tv setup. HD will eventually be the only way to go, but thats still 5 years off at least, when the tech is so affordable that its foolish not to buy it.
So in my opinion all of the 1080p-1080i talk is getting a bit beyond the lifespan of the console. Microsoft and Sony will be cranking out new consoles before 720p controls a 60% share of the market. So all of this banter now is just a pissing contest between people that simply want to say they have the most powerful machine. 10% of the market can actually support their upper end specs and it might not be above 50-60% when the PS4 is out.