Of course Hollywood will be looking to do more TV shows as movies. They've pretty much run out of original ideas. They've got a long track record of remaking old movies, some with a more modern touch.
The problem I have seen with movies made from TV shows is this: Either the movie is basically a re-hashing of several episodes, or else the movie's atmosphere strays far away from the original TV show's atmosphere, theme, etc.
"The Brady Bunch Movie" is a good example of the former. In the first and (God forbid, why did they do it?) second movies, a lot of the scenes were replays of well-known episodes, like Marsha having her nose broken by the football, Cindy learning a valuable lesson in being a tattle-tale, and other cutesy scenes.
I haven't seen the movie adaptation of "Alvin and the Chipmunks". From the previews it doesn't look all that great. I've heard from others to not bother with it.
One thing that really annoys me about movies is that they don't stick to the original form of the show. This often results in ridiculous sets, and even more ridiculous-looking characters. Case in point: "The Flintstones" and "Speed Racer." Bonus: See if you can find the connection. Some animated TV shows turned to live-action movies worked OK. Not well, but OK. Main one I can think of is "Fat Albert." The cartoon characters started out as cartoons, then became "real" when they came through the TV to help Kyla Pratt's character. One movie that never should have been made live-action is "Garfield." It would have been better if it was fully animated, and looked more like the comic strip/cartoon characters, than trying to look realistic. I would have even let a CGI Garfield slip by.
In relation to "Speed Racer", I read that there is an "Astroboy" movie in the works. The kid that played Charlie Bucket in Tim Burton's version of "Charlie and the Chocolate Factory" is slated to play the lead role.
TV Shows I'd like to see made into movies: Full House, Cosby Show, Adam-12, CSI (Las Vegas), Law & Order: SVU, Kim Possible, Fairly Oddparents, House MD, Mythbusters, and a couple of others.
For the animated shows, I'd like them to stay animated when made into movies. Kim Possible might could be made into live-action, but it would be best to keep it all animated.