Just when there seems to be a Starbucks (SBUX 0.98%) on every corner, the Seattle-based company has decided to launch 15 Seattle's Best drive-thrus across the U.S., starting in Dallas.

But why now? Expectations for Starbucks are high. In addition, the company currently trades for a P/E of 31, and the China opportunity may not be enough to satiate investors.

Get the scoop on why Starbucks launched these drive-thrus and catapulted itself into competition with McDonald's (MCD -0.25%) and Panera Bread (PNRA)