I'm gradually moving on from email, in some respects anyway. While I IM and will occasionally video call people at my level of employment, I like the lack of rush with email for when communicating witth higher ups. I can fire off an email, know that I've made the effort to contact them and then if it takes them 2 days to reply, that's not my fault.
There's something about email that keeps people at a distance too. IMs are nice, but if you have too many people under you all trying to get you to micro-manage because you're within easy reach, it can get far too time consuming.