I've hooked my old TV up to my spare blu-ray player in the bedroom. Mainly so I could check the difference in blacks and shadow detail.

I was thinking the Panasonic 65VT50 was clumping the blacks into black blobs, leaving little to no shadow detail. Particularly in the THX Cinema (post calibration) mode.

Good thing I did this, because I'm seeing the same thing on the old one. But because the blacks aren't as deep black, it wasn't as noticeable. There is also no comparison in colors. The VT50 has brilliant beautiful colors, whereas the cheap Samsung LCD now looks washed out.