Asus 901 - 10 inch screen
MSI - 13 inch screen
Can you all see what is happening here? Notebooks have traditionally settled on a screen size of about 13 inches or greater because that is comfortable to work at ..
If you are a child with small hands, sharp vision and a limited budget (from the bank of mum and dad) then a subnotebook might be winging it's way to you as we speak. Else just think again. For non occasional use you will need a large screen.