Errr Nah
Its up to the User on what Wall Resolutions they do, most tend to do Walls on their Resolution - the popular one being 1024x768. Soon it will be 1280x1024 as Monitors will obviously get cheaper as bigger resolutions will evolve.
The User can always add another Resolution depending on the Image, like me I have both 1024x768 & 1280x1024.
If you take that into consideration you would also have to do the same with sigs. 500x200, 350x150 etc etc. Wouldnt work
IMO.
You'll just have to look at what Wall suits you and your monitor, same for some of us too.