#2. Non-scaling backgrounds
All of the sites use the feature of having a non-scaling background. No matter what horizontal size you stretch your browser window to, it will not stretch the background.
All sites except for Big Day Out use a centered design (which re-centers the background when you resize the window). The Big Day Out site uses a left aligned background, which means as you drag your window wider and wider to the right, the content stays on the left and all there is on the right is a repeated background image.
Semi-related to this is the fact that all these sites have a horizontal resolution of less than 1024 (smallest common display resolution). They are as follows (approximately)…
- Coachella: 1008
- Big Day Out: 986
- The Falls Festival: 951
- Stonefest: 894
- Splendour In The Grass: 958