Our coach came with a Stressless Lounger. One of the advantages of this brand is that it has a slider with a locking mechanism that allows you to lock it in any position within its range of motion. So you can lock it in an upright position to enforce sitting upright.
But, that being said, it still sits too low to really work with a normal desk height. There is a mounting bracket to hold a small table across the seat. But, I find this to be rather awkward for even my 15" laptop.
I seriously think you need a desk chair for working at a desk and a lounger for relaxing. Someone may have an idea for a dual action unit. But, I can tell you the Stressless brand is not designed for that application.
2003 Beaver Patriot
2014 Honda CRV Toad