I think that genetically designed sex animals will be a more lucrative market. Imagine instead of having an ordinary pet, you have a being designed to maximize sexual pleasure while maintaining basic emotional exchange. A being imprinted to you that will be 100% loyal and designed exactly according to your wishes. Actually I think genetically designed pets in general will be a huge market in 10-20 years.
I will try to enter or create the market when DNA re-sequencing becomes more economically viable, just need to find a geneticist mad enough to help me!
As for fucking robots, sure if they where hot enough and it felt like the real deal or better.
