here's my own, less than scientific comparison. unfortunately(or fortunately) I don't own any comparable matte screen TV's, so this is the best I can do.
I've also spent the effort needed to make sure I don't have lights reflecting off my screen, so I used a flashlight instead. I imaging sunlight would only makes things worse.
here is both TV's off, with a flashlight pointing in their direction. so, a small reflection in the 'clear screen', or the entire 'matte screen' being washed out. in fact, you can even see how the f8500's louver filter actually spreads out the light vertically, so this isn't even the best case 'clear screen'.
same thing with the flashlight off, and the TV's displaying an image. aside from the obvious difference in quality, TV's are comparably bright(so this is about the screen, not the panel behind it)
and now we have some random screenshots from movies with the flashlight back on. I'm not sure which one you'd prefer, but i'll take the 'clear screen' everytime.
even the brighter scenes look better on the clear screen imo. I think perhaps a full screen animated movie might look better on the matte screen, but I don't base my buying decisions on how good the simpsons look...
now, where I would say a matte screen is a good thing, is when you have a large area of medium brightness. say your room is entirely white, but not super bright. in those conditions, a matte screen does a good job of hiding reflections of the room, but only if it's not bright enough to wash out the image on screen.