I'm less than enthusiastic about this approach, although I'm down with technology. This is nothing else than an excuse for people to stop learning foreign languages.
My first gripe is that machine translation more often than not contains tons of errors. Even when it gets right, something is still missing. You lose human touch, sense and soul.
The next thing that worries me is that this is just another thing that would make your brain go numb. When you take away the stimuli, that's when your brain loses interest and there goes intelligence down the drain.
Secondly, we are becoming nothing more than couch potatoes, with machines doing the working, the speaking, the entertainment and whatnot. Ultimately, machines will realize that we're actually the weak link and will start doing the "living" for us as well.