There's actually a little bit at the end of the store page that mentions how developers can put it into portrait mode to see more code.

The thought of some dev buying this thing just to stare at xcode all day is kinda hilarious.

>Oh, I understand it's a reference-quality, blah, blah, blah, but I just need something to replace an aging Cinema display that was originally $1000.

That section of OP's comment seems to clearly show this understanding.

I do get it, but my question remains: what does Apple suggest that I, a developer/prosumer, buy? Something without an Apple logo on it?

At this time, yes. They saying "go and buy display without our logo, as now we're focusing on other pro group". For years now Apple after each conference was bashed for lack pro hardware and display for video editors, etc.

I would bet that next year will be with smaller displays for everyone, and maybe native terminal on iPad... :)

Either way todays WWDC was one of the best in recent years, and they responded in a good way to many problems and wishes.