Other than Google X, a R&D division, Google puts all its resources into just seven major products.
Weirdly, two of those products are operating systems: Android and Chrome. Android is Google’s operating system for tablets and phones. Chrome is system for desktops and laptops.
If this seems strange to you, you’re not alone. Sundar Pichai, the Google executive in charge of Chrome, gets asked about it all the time. In fact, In this clip from an interview at All Things D last night, Pichai says even his mother wonders why Google invests so much money into two operating systems instead of just one.
Pichai’s explanation, paraphrased: Android is a big success on tablets and phones, but Chrome is the OS for desktop and laptop users who do all their work in the cloud. As long as the products sync between operating systems, it’s OK to have two. Sometimes people want to work on desktops.
His full answer (and comments about his mother) come at around 9:40 of this video.