About TV, I disagree strongly. It was not developped at all during WWII. It was developped in the 1920's and 1930's. Actually WWII never accelerated its developement, it delayed it. TV had been available to the public in the early 1950's but without the war it would certainly have been available in the early 1940's (for France).
Vichy France has nothing to do with it (actually you had no TV under Vichy). As of June 1940 all the french national press, TV and Radios were taken over by Germany. The only press publication allowed by Germany was "l'Humanité" (communist) that was printed up to 1941. Not surprising when you recall that USSR was allied to Germany and that the French communist party was instructed, by Moscow, to help the German in all their military efforts. If you want to know more about this ask U.S. historians they are good and very knowledgeable about that.
About TV, it was emiting from Paris, under strict German regulation (actually it was turned off until 1943). However, the developement was done under the 3rd Republic with a regular program as early as 1937 (100 TV in Paris). A program was on the air every evening between 20pm and 21pm (about). It was slowed down a lot as a result of the war.
In the US, General Electric started with it in 1928. 11 years before the war (First politician on TV in 1928). The admited date for its invention is around the mid-1920's (1924 or 1923) in the U.S.. By the way TV was invented by Russians who emigrated to the U.S. after the soviet revolution.
If you look closely at everything else you might find the same, Wars delay things except, of course, when the thing is a military application. Germany sent a missile to lower space in 1942 as they wanted such device to deliver an atomic bomb to New York and Washington in 1945 (U.S. have been very good and a bit lucky on that one).
