Your enthusiasm about HDMI 1.3 is fine, but lets fine tune a little of what you are saying.
True - HD should be on a 40" + size screen, in fact to achieve true HD 50" and above used to be the rule, just due to resolution (1920 X 1080)
Film studios use film, which ultimatly gets "converted" to disc or other medium for broadcast and home use. The quality you see on your TV has nothing to do with how a movie was filmed. Even live TV or Studio TV is going to look good or bad based on cameras used, and delivery method. Just because it's an HD channel doesn't mean it will look great. No one can force ABC or CBS to buy the top quality 1080p cameras when they can use 480p or other. I am sure many here that already have HD programming will agree that there are lots of differences that are VERY visual between one HD channel and another.
Just because a TV says it can do 1080p doesn't mean it shows it, it could be scaling the picture down to it's native resolution.
Hdmi 1.3 - yes it's coming, and yes it will ALLOW for tons more colour and other features, which also have to come along too. Right now 1.3 would look the same as 1.0. (I have never heard of 2.0, maybe thinking about USB)
As for the different shape, I have heard both sides of this, so, not sure untill it actually shows up. Yes the smaller connector will be for camcorders etc, but I understand for consumer electronics it will look the same, or their will be an adapter. I also have heard that you will be able to plug in a 1.3 into a 1.0 set, just won't be able to take advantage of all the features.
In north america a billion is 1,000 million.
(3)The connectors only fall off when you get cheap gear or wires, you can have the same issues with other connectors too.
(4)HDCP isn't unreliable, some manufactures are too cheap to build product that meets HDMI and HDCP spec's, so you end up trying to connect 2 pieces of equipment with HDMI and it doesn't work, usually because there isn't a handshake between them.
Look up simplay HD.
(5) 1.3 won't solve this issue, see above
(6e) you mention 2.0 and 2.0a hd, I have looked around and can't find anything about those formats
(6f) Very few people know about 1.3, I really don't think they are marketing it quite yet, remember 1.3 really is more like a doorway to allow even better content. My guess is that the gaming market will be the first to really embrace it for picture quality, some manufactures might jump quickly for the communication between components.
Laser TV is being worked on, prototypes exsist. But probably a long way off before we see sets in stores.
Lcos has been around for awhile and is very good, actually Lcos is Sony's name for JVC's DiLA. Not Flat TV's though, but excellent picture quality. I use JVC's in a lot of projects.
DLP to replace plasma, Hmm, not likely. You have been reading things written by the "establishment" haven't you... and it's LCD replacing plasma that some seem to think will happen. I'm not sure why, plasma works very well, none of these dead pixel problems, great picture when set up correctly. Some writer somewhere without all the facts must have started that one.
You missed the other tech, LED's. They are already in use in large displays (billboard and bigger) it could just be a matter of time before we see them in something smaller. LED's use very little power and have a life of 100,000 hrs.
HD tv's have come down in price, how much lower do they have to go?
You can already buy a 42" plasma for less than what it would have cost you for a Sony 32" XBR CRT set about 5 years ago. The margins have shrunk to the point that CI firms are now not bothering to sell them, just charge to install them.
It's just TV... buy something nice, and keep in mind you will have to endure some good pictures and some bad ones, while we go through the transistion to all HD programming (eventually).