Let's be fair here, that Mitsu is from 2002. While I'm sure it's a fine TV, it's old technology, over half a decade old! That's several lifetimes in the consumer electronics world. And it was well before HD was firmly established.
You can do 480p, which gives you 480 progressive lines of resolution. Or you can do 1080i, which gives you 540 progressive lines of resolution. It only does 1080i, 480p, or 480i. It's quite ancient by modern HDTV standards.
Again, that's not to say it's not a fine set. I'm sure it is. But you have to put it in context. The Roku isn't the problem, your TV is.
While this is true, there are tons of people out there with this exact problem. I am one of them. Currently we are just screwed when it comes to HD on the roku box. During the beta I and a few others voiced our concerns over this exact problem. They recognized this was an issue but this update just wasn't going to be able to help us. They do hope to add it in the future but who knows if/when it will actually come to pass.
When you pay 2 grand for a tv, you dont want to have to buy a new one because a $99 box can't output 1080i and frankly why would you even want to. Sorry, for 2 grand I expect my tv to last me at least 7-10 years for that kind of price. I think it was short sighted on the part of roku not to figure this was going to be an issue and not have some type of system in place for it for when they released HD. But what ya going to do. I guess
my only choice for HD on netflix is watching it over the xbox. it does upscaling to 1080i so I can at least see the picture.