Whats The Difference Between 1080p Output And 1080p Upconverting What Is The Difference Between Analog And DVI On A 720p HDTV?

What is the difference between analog and DVI on a 720p HDTV? - whats the difference between 1080p output and 1080p upconverting

I have a 42 inch plasma screen from Samsung and love it. Although I remodled my house so it looks more like a film and discussed the upgrade of a cable.

Now I can connect my PC to the TV with an nVidia 8800GT OC that has dual DVI outputs. To connect to my TV, then connect a DVI-to-analog converter and then connect the analog cable to the PC port on the back of the TV.

If I buy something like this product:

http://www.newegg.com/Product/Product.aspx?Item=N82E16882021059

I want to finish with a noticeable difference, or I do not see anything else? I know that I 1080p, but it was 2 years ago. We hear a lot of money, so you think you could with a value of $ 11 + will be?