Originally posted by LikeASong:[..]
You meant to quote me?
Is 3000x1500 pixels equivalent to 80x40 cms, really?
Depends how many pixels are there in a cm. That depends. The more pixels in a cm the more detail you can show. However to many is useless because your vision is limited.
Compare it with a digital camera. You have 5MP camera's and 24MP, you can print them both to 10x15 format. Only the last one will look a lot better on bigger formats.