This makes me nervous about Google's long-term prospects. There just aren't any new ideas here. Pichai has been very focused on mobile, and that's not a bad idea exactly, but it's just riding a wave created by Apple almost ten years ago. He's now starting to talk about virtual assistants, but that was kicked off by Siri's launch, almost five years ago. To have long-term success, Google will need to develop genuinely new ideas, ones that not everybody has already heard about. You can't be the biggest player in technology if you never take any risks.

(disclaimer: former Google employee here)