Deja vu..... You'll recall that the Web was gonna kill the desktop, and client/server, but look around. Sure you'll see a TREND toward more Web/cloud stuff, but the use cases for the old stuff don't go away. Everyone's a top-down, absolutist on these things. If you think bottoms-up, based on customer use cases, you'll have mainframes, terminals, PCs, and client/server -- for good or for bad -- around forever.
That and ego/politics; few Type A managers are gonna give their sensitive data over to someone they can't choke. So you'll see more cloud, and yes a greater tolerance for the model overall. But you won't see everything go online. What remains to be seen is whether the cloud enthusiasm tempers progressively, or bursts like a bubble.
Arguing with an engineer is like wrestling a pig in the mud. After a while, you realize the engineer enjoys it.
Top Ten Things Overheard At The ANSI C Draft Committee Meetings: (5) All right, who's the wiseguy who stuck this trigraph stuff in here?