It seems like tvs are cheaper then monitors but can they be used as one for my MBP.
The price when I bought this was around $500, and a 30" traditional computer monitor at the time was well over $2,000.
The difference being two million more pixels on the 30" display with its 2560 x 1600 pixel (4,096,000 pixel) compared to a 37" TV with 1920 x 1080 pixel (2,073,600 pixel). Also consider the pixels per inch, which are almost 60 PPI on the 37" TV compared to the 100 PPI on the 30" display.