Let's say I want to use it with my Ipod touch, will it add the 80 hours of battery life to it? Will any mp3/4 player and laptop in the near future benefit from the E7?  

Let me get this straight. -You don't need a FiiO E7 when the soundcard of your pc is good enough. I guess that in a year all soundcards will be better than the soundcard in the E7. -The only other thing useful about the E7 is that it's portable? But all it does is amplify your mp3/4...