The smaller, lighter, more compact the device, the higher the rate of theft.
Not everyone lives in a mobile environment, traveling from job site to job site or attending conferences. Businesses that have occasional travelers have loaner equipment (today laptops, tomorrow tablets) but in the office they have a desktop. The 8-5 worker bee uses a desktop.
In the home, I can see an environment where a family would have a home network set up with family members having a portable device of some sort backed up to a home server.
