I would think many users do not need to see the keyboard to type. Even if one did not learn the proper typing techniques, most ppl should be able to identify the positions after so many years of internet. Just like how we sms on our mobile phone, you do not really need to see the keypad to sms all the time right?
truth to be told, subconsiously, you should be able to memorise the positions of the keys.
dont believe?..paste stickes over your keys and type...shld be no problem at all...( not ALL your keys though.)