The Company Store generally doesn't sell a lot of hardware. I live a few miles from there, and it's designed to sell Apple-branded merchandise, like coffee mugs, hats, shirts, pens, jackets, etc. They have hardware on display, but they're not designed to deal with general retail equipment purchases.
They have software, and they sometimes have smaller hardware, e.g., iSight, back when it was separate, but I don't believe they ever sold iPods, and I would be surprised if they were selling iPhones, particularly since all employees will be getting one for free in a month. The Company Store is there primarily to market to employees, friends and family, and the occasional rabid fanboi (and note that, since I've been there many times, one could argue I qualify). It's not meant to be a retail store replacement.
Besides, to be honest, hanging around Infinite Loop is rather dull, unless you know employees. There is no angelic choir, no foot soaks and massages, no free Segways, and no topless chorus girls. It's just a business campus, like every other in the valley. But hey, at least there's free wifi on-campus.