For the presumably-small number of users looking to spend over $10,000 for more desktop real estate, take a look at CineMassive's OmegaPlex.
This 27.6 million pixel display wall takes twelve 24in full-HD panels and stitches them together - with a useful 30 degree curve, mind you - to provide a total resolution of 7,680 x 3,600 pixels. Your desktop wallpapers will never have looked so good.
The OmegaPlex is claimed to be the final word in multi-monitor displays, and it can be yours for $12,995. It's backed by a three-year warranty, and CineMassive guarantees no dead pixels. Should you run into any erroneous pixels, you'll get a swift replacement panel.
It's the ultimate piece of show-off kit, but is it any good in practise? CineMassive's official specification tells us that each panel is of the lesser TN variety, the contrast ratio is an average 1.500:1, and a response time of 6ms won't please the gaming enthusiast. For the $13k asking price, we'd be asking for more. Not to mention that you'll need twelve DVI outputs to power the thing. Check out a demo video below.
Official product page: CineMassiveDisplays.com