After hearing words of sorrow but optimism for the future from Best Buy (NYSE: BBY) executives this morning, I was wondering what the company has up its sleeve to shore up profits and keep growth happening. Sure, the services area of Best Buy's operations, growing relationships with customers and ensuring product mix stays consistent for the best margins possible are all good ideas. But one idea may be the jackpot of them all: cellphones.

Best Buy Mobile is more of an experiment than anything, but the largest consumer electronics retailer in the country wants to make sure its face is planted inside each and every future mobile phone user there is. To that end, it's setting up standalone mobile product sales centers to further its brand, earn more mobile phone commissions and really entrench itself as the mobile product provider of choice even as mobile phone subscriptions are showing signs of slowing growth. More and more advanced phones (and mobile emailers like Treos and BlackBerries) will become popular and the phone of old will become the electronic Swiss Army knife soon. Heck, that's already happening.

Best Buy's biggest foe here is Radio Shack (NYSE: RSH), which counts on mobile phone sales and plan sales to drive a healthy chunk of its revenue right now. Circuit City (NYSE: CC) dropped out of the game a few years ago, so for all the phones and plans that are not sold from mobile carriers like AT&T and Verizon, Best Buy and Radio Shack will be the big dogs. I'm of the mind that this is a fabulous strategy for Best Buy at relatively little cost compared to the potential upside.