We will soon be looking on music stands as delightfully old-fashioned totaqlly 1954. Singing while looking at the words on the clever phone is already creeping in. The next big thing will be the spread of people using the phones to play the backing track while reading the words off the phone. And then, joy of joy, we will get to the universal Beyonce mode of performance, when the phone will not only play the backing track but also your vocal which you recorded in the privacy of your own home.