I was wondering if anyone had any thoughts or experiences about using a standing desk post resurfacing, possibly as a way to avoid the 90 degree  concerns initially but also  long term as just being  better for the hips, or possibly a wobble stool, which allows more movement of  the legs and less of a hip angle. 

I'm a computer engineer so I sit A LOT, and sitting hasn't caused me any real problems.  I'm 7.5 months post-op now and the hip does get a little stiff-ish from sitting a lot, but just moving around makes it feel better.  There is zero issue while sitting.  My doctor said there are no restrictions on range of motion post-op, and I've pretty well tested that with success so far, double check with your doctor about any restrictions.  The more I move the better I feel, so I think the best long term thing is just to get up and move around often.  I know, easier said than done when working a desk job..  Side note: yoga really helps the hip feel better, and long intense bike rides (1.5-ish hours) really help everything feel better too. 

Thanks for the input. Definitely agree on the bike riding- I'm only 1 week post BHR, so 6 months until that, or 3 months indoor bike.  Its all a little confusing which desk posture approach is good and bad.  Sitting seems to come closest to that 90 degree point to avoid.  On the other hand, maybe standing post surgery is not a good idea, since everything is still healing up and it might be too much stress. Wobble stool  might be the happy medium.

Most modern office chairs have a height adjustment that takes you below 90 degrees or you can buy a seat cushion. In practice, being able to stretch the operated side out rather than having your foot flat on the floor all the time takes a bit of the strain away and the actual risk from the 90 degree rule is more to do with the physical act of sitting down and especially getting up. If you lower and raise yourself slowly taking most of the strain through the "good" leg, most surgeons will tell you the risk is minimal. It is trying to push yourself up using too much force through the operated leg when planted at greater than 90 degrees too soon that you have to avoid.

With either sitting or a stand up desk, just ensure you take ref=gular short breaks to move around as that's what maintains comfort.