In a conversation with a couple of developers in terms of adding some internet applications to a framework we diverted into a discussion of what applications are no longer of paramount importance going ahead.

- Blogs, seems WordPress and the free online sites have pretty much cornered the market. Why write a new one?

- Forums, Facebook et al seem to be impacting most forum sites, even long term highly successful ones. With vBulletion and Invision looking to be in the doldrums, and xenforo not exploding into the stratosphere as certain people expected, are forum applications a thing of the past?

- Photo Galleries, well half an hour and some jquery later you can have a pretty good looking app.

Agree, disagree?

Any others you think wont be around by 2020 (assuming the planet still will be).