Most iPad cases just prop up your iPad at a slight angle so you can view it on a table and then fold up around the iPad to protect it. The just announced GorillaMobile Ori from Joby does more than just prop up your tablet, it lifts up the iPad above the table or desk to a more comfortable long term viewing height.
The Ori name cues you in that it draws inspiration from origami and as such this case does contort to allow for four different viewing modes with adjustable heights and viewing angles for comfort. It also folds up to protect your iPad in case mode. The Ori is made from a aluminum and polypropylene composite and costs about $80.