There's 1440p?

I've been living a lie...

That's the one.

Good chart.

That claim is completely false.
I have a 40" 1080p Sony Bravia xbr4
I play DVDs and Blu-rays on the same TV using my PS3.
The colors alone make a huge difference and especially the black level.
I've seen Super Bad on DVD and Blu-ray.... friend's Blu-ray and my unlimited monthly blockbuster rentals... 3 minutes away from my house... wanted to test out TV...
ANYWAY, the colors and black level we're MUCH better with bluray, not to mention the sharper picture. I calibrated my TV for 1080p signals btw, but I did try out "standard" and eye burning "vivid" on both sources. 
Oh and please stop typing in "Bold".

@Twesterm
Depends on you really.
Do you love a movie so much that you would be willing to spend some extra dollars just to collect and watch it in it's best home version?
There's also the possibility of you buying a bigger set down the road.

I'd recommend keeping your DVD collection and only buying the exceptional new ones on Blu-ray that YOU think are worth the premium.

I myself haven't bought a single Blu-ray movie, but that will change once Wall-e comes out. ^_^

Also, DVDs usually comeout on 4:3 and 16:9 ratios usually cutting the sides off movies, while BD movies(while not all) come in 2.35:1/2.4:1 which actually shows the sides of a movie cut out on DVD versions. Though this does make the movie appear smaller with the black bars on both the top and bottom on an HD set, though you can always "zoom in" to 16:9(cutting the sides just like the DVD version, the image would still be sharp though because it's 1080p on a small display) if you want. Atleast you're getting the "complete" version right? =P 
When you do get a bigger set, you can sacrifice the top and bottom of your display to the dreaded black bars and try out the 2.35:1 aspect ratio and see the "whole" movie.

Lots of good points/advice ^

Improved color rendering and picture contrast/gamut range, as well as a reduction in noticeable compression artifacts are worthwhile benefits.

But again, either a consumer is willing to pay a premium for a perceived difference, or they aren't.

Did you read my post?  I specifically said a non-upscaled DVD looking the same as a Blu-ray on a 46" is ridiculous.  Which it is.  But saying an upscaled DVD looks the same as a blu-ray on a 46" is also ridiculous.  Unless for some reason you are talking about an SDTV, there is a noticeable difference on HD sets.  Like I said, I can easily see the difference on a 720p 32" TV.  So I am sure I could see it on a 46" 1080p TV.  Why are you trying to come off as an expert when you yourself said your only experience with Blu-Ray was watching Talladega Nights?  Also as someone else said, this movie came out in Blu-Ray's infancy, and even then it got low ratings for image quality, despite lower standards at the time.

I can completely vouch for this statement.  Although I've got a 37" 1080p TV, the fact is a film has to be shot on decent cameras to get the best out of Blu-Ray.  Planet Earth is a great nature series shot on fantastic cameras, and the quality of the visuals on Blu-Ray has to be seen to be believed.

There is a substantial difference between Blu-Ray and DVD, but whether you will see it depends on the video quality of the film you're watching.  Unfortunately, it is currently only the big new blockbusters that will show the differences.  I wouldn't replace any film I already own with a Blu-Ray because the difference isn't great enough to justify that, but when I buy a new film I do think about which version to get.  I currently buy 40% Blu-Ray / 60% DVD.

I have replaced a few of my DVDs with blu-ray, such as MI trilogy, Spiderman trilogy and soon the Matrix trilogy, but that is just because those films are so awesome.

I assume that even older films will look better on blu-ray, better than upscaling, and I definitely think that the difference is noticable

For me, it depends on the movie. I loved Cars, Man on Fire and Fighter Pilot. I will definitely buy them when I can get them for about $15 a pop. I could care less about snagging new ones unless they are that cheap.

I actually have more HD DVDs than Blus, but it's pretty much neck and neck. I got 5 from that PS3 40gb I had flipped and was getting 5 more HD DVDs that I have YET to receive from a similar offer.

I will only buy a Blu if:

1. It's a movie I really like
2. It's $15 and under
3. I'll pay more if it's a movie I have to have.
4. I can't buy the HD DVD version

Watching movies in BD/hi-def is worth it, paying the extra premium for them isn't I suggest just renting them off netlfix like I do. Best of both worlds.

I haven't seen Wall-E yet, but the first Pixar film I plan to buy on Blu-Ray is Finding Nemo.  I love that film, and I'm sure it will look absolutely beautiful on Blu-Ray. :D

I *might* but Monsters, Inc. at some point as well, but only if it's really cheap, and I have lots of spare cash. :P