Lindsay Holmwood has written about the benefits of a standing desk and how to buy one . The case for avoiding sitting is strong, but I couldn’t stand up all day.
One thing that’s been on my list of things to do if I had an unreasonably large amount of spare time or money is to make a reclining computer station. The idea would be to take a bed and mount a TFT display above it so that it can be viewed while lying down. Then a split keyboard would be required so that each hand can be used for half the keys (this would be difficult or expensive). If the keyboard halves were aligned correctly then it would reduce the carpal tunnel problems associated with computer use (which has been a big problem for me in the past and is something that I will probably never fully recover from ). As far as I am aware the risk of back problems is eliminated when lying down, so two of the major problems with regular computer desks would be avoided.
I don’t think that lying down all day would be that great and it wouldn’t work for collaborative projects. But as monitors are so cheap nowadays it would be viable to have a second monitor at a desk connected to the same computer. Then I could spend about half my computer time lying down.