Yahoo CEO Marissa Mayer just made her first announcement onstage during her Consumer Electronics Show keynote — that the company has acquired Aviate, a startup that taps the apps on your smartphone to bring up information at the moment that it’s relevant. Mayer suggested that Yahoo could use Aviate’s technology to deliver its content in ways that are “smarter and more personalized.” For example, she said that your homescreen could automatically show you stock quotes at the beginning of the day, instead of forcing you to open a finance app. The company offered more details in a blog post: “We envision homescreens becoming smarter, more personalized, aware of your context. Aviate helps us bring this vision to life. Aviate auto-categorizes apps on your Android phone and intelligently gathers them into “spaces.” By using signals to understand your context – WIFI, GPS, Accelerometer, Time, etc – Aviate automatically surfaces information at the moment it’s useful.”