You can also specialize in building mini computers, like those:
I am sure you can find people that want a unique computer, but doesn't need GPU power, or even very powerful CPU (Core i5?).
Have such computer with high quality low speed fan for an ultra quiet experience, and a touch screen like the Dell S2340T monitor (IPS - 1080p) (http://accessories.us.dell.com/sna/productdetail.aspx?c=us&cs=19&l=en&sku=320-9517&dgc=BA&cid=266740&lid=4859195&acd=12309183969360129)
or better yet, one that can over your keyboard in some fashion, if you can find one.
Add a nice backlight keyboard like the Logitech illuminated keyboard
and matching color mouse (preferably wireless), and speakers. And you have a pretty slick computer to sale.