So.... I'm guessing you're saying that 3rd Ed could adopt a similar approach, and then people wouldn't have to switch to 4th Ed?
People are making the edition change for a _lot_ of reasons. Monster Statblocks are only one of 'em.
As for what you've done...
Well, first I'll say it looks groovy.
After that...
I honestly don't know how many people would be willing to see a full monster manual done up in this style. I _personally_ think it'd be interesting, but part of the deal with a lot of
3E fans is the issue of consistency.
Right or not, there's a strong desire and push for things to be as standardized as possible. Creatures, NPCs, Characters... everyone following the same rules.
The sort of thing you've got there on the other hand, I'm not sure you could really do the exact same (or really close) type of layout and illustration for every kind of creature.
If you have to shift the layout around and locate information (say size and saves for example) in different places owing to the size of the stat block or the art, people are going to complain (long and loud) about how they have to "struggle" to find the information.
I'll also note that one thing I seem to recall
3E fans bitching about in regards to
4e is the lack of flavor text. I'm not seeing anything in that display other than basic stat stuff.
I think it's cool, but I think people would need to see a number of different creatures done up to see how it might all look. Maybe one of each creature type for example or something.
On the other hand, if you're not actually proposing some sort of rule or looking to do this as a project (you're just saying, "isn't this cool") then... yeah, I guess it's cool. Now what?