TV Size Calculator and Comparator

I found this link while looking for a quick comparison of 16:9 TV surface areas. I found the output from this tool very useful, but haven't checked it for accuracy. For example, it told me that a 50" 16:9 TV (vs. a 32" 4:3 TV) is 63% larger when viewing 4:3 content (SD), and 190% larger when viewing 16:9 (HD) content.