I see a pattern of emerging technologies in the Internet. You can always tell an emerging Internet technology because it is battered by a mass of bad press. But if you look at the details you see solid growth. Anything the media loves is in trouble.
Right now certainly SharePoint, collaboration and BI are hot, but what is coming in 6 months:
I see Second Life taking off Twitter is suddenly hot and all VR is taking off Facebook is pretty established and replacing LinkedIn