How many layers are too many?

[tron3]

Start with the simple facts most of us know.

HD-DVD = 15 GB
BD = 25 GB

We have known for a long time that dual layer discs are pretty reliable and play back well. In fact, many of the discs we buy are dual layer 50GB discs. You can sort the titles by size here. http://www.blu-raystats.com/

HD-DVD has that 51 GB triple layer disc they announced. (17Gb per disc.) Yet, no one knows if the current crop of players will support them. Flashing the firmware might not do the job. Broken promise?

If BD goes triple or quad layer, HD-DVD simply can't catch up and expect to play back correctly. Hence I have the new nick name of "H-THICK DVD."

While I think a triple layer BD would be great, I'd like for it to give me something back in picture and sound quality, and not so much in extas. How many layers are too many?