As mentioned in the article for Apple to have a successful desktop, they need to make it boring. A simple tower that allows the users to upgrade a couple components like the RAM, hard drive and full-sized graphics card. I think the starting price should be around $1600 which was the entry price of the PowerMac G4 back in the day. At that price it should be on par with the 27" iMac or better since you don't have to include a retina display. I'm not sure how big the market is for desktop macs anymore, but I'd really like to buy a mac like that.