Wireless portable televisions come in a variety of sizes. Check out this link for information and reviews on many televisions. http://www.epinions.com/t-wireless-flat-screen-portable-tv
7 to 10 inches would be a good size for a wireless portable tv. Larger sizes than this would invalidate the portability aspect; smaller would strain your eyes!
Yes dvds can be watched on a wireless portable tv as long as there was a dvd player hooked up to the device, or the device came with a dvd player pre installed in it. http://reviews.cnet.com/portable-dvd-players/audiovox-d1020-dvd-player/1707-6498_7-30905536.html
Several companies make wireless TV routers. I personally use a cisco router, and it is very good quality.
The answer is YES....just do a web search of "portable battery operated digital televisions" and you'll find what you want.
You have two great options to find portable digital tvs. Target offers a large selection of very good portable digital tvs. The other choice is Wallmart which might not offer the best quality but always offers the best price.
Screen sizes on portable dvd players for use in cars will never be as large as normal televisions, but they do have to be large enough for practical use. The sizes available tend to to run between 7 inches and 10.2 inches.
Sadly there aren't any books that I know about making a GameCube portable, but there is untapped potential on the Internet. Certain sites teach how to use device such as the GameCube in a vehicle using an inverter and a small TV that you can buy for cars (granted it will need a RGB connection). Advanced "hackers" of technology, can tear apart a game system and make it low-profile, around the size of a netbook complete with wireless controllers.
Yes, there are portable TV Radio Combos available.
There are many website that offer a portable tv adapter. I have found the best prices on amazon.com and circuitcity.com though. Make sure you put in the specifics because they come in many sizes.
Amazon has a large variety of portable televisions and tend to change their sales daily. Also, try stores like Walmart and Best Buy online as well. They may have better deals online than in store.
I took my portable TV with me on vacation
You COULD use an HD wireless receiver, which has antennae and receives HD channels in the air, and converts it to a digital HDMI signal for your HDTV.