I had the same thought but found there are very few TV-size monitors on the market, and the ones there are cost an arm and a leg. There are also very few "dumb" TVs -- we finally got one by Insignia, Best Buy's store brand, which has been fine. If someone knows a better alternative please let me know!
Worth clarifying that when I was a kid "TV-size" meant anything above 13", but the times have changed considerably. :)