Since I moved to a place where the nearest laundromat is 2 blocks uphiilll and pricey ($5/load), I admittedly did take a quick look into Washio, but noticed there was a minimum order of $20. It was a luxury service, or a good for fresh graduates who believe too much in the "your time is money" mantra.
If you want another "wtf, do we need this" service, check out TrashDay.co, saving us the indignity of taking out our own trash.