Google is not Apple

This is not a good idea for Google. Apple already had an avid following for their products when they brought out the iPad. Google doesn't have that base of people who are devoted to their products and will go search for a company store. Also they don't sell their products for premium prices like Apple. Their best bet would be to sell through the big box stores at higher volumes. They could then do the next best thing by having a prominent presence of company personnel in the stores.