No matter how much technology advances, nothing is going to change the shape of our ears or the audible frequency range of our ears. Good sounds can be produced only by big speakers, so it doesn’t matter if an mp3 player is just the size of your thumb, you need good speakers to listen to the music it produces. Speakers means wires as they need to be distributed, and that means mess. So though we can’t reduce the size of speakers, the best we can do is to eleminate the wires. And technology has done that for us, we have wireless bookshelf speakers now.