The End of E-Mail?

An executive at a large web services-providing company recently remarked to me, almost casually, that "E-mail is over." What he meant was, his company and all the other big players are focusing heavily on the future they see coming: content and messaging for mobile devices. E-mail from computer to computer? That's over and done with, in these guys' minds. Since we all eventually follow where they go, I'm just sending out a heads-up here.