For companies with most of their clients using their own personal computers (like for us), we could expect a fair share of Chrome over IE and hence the following: 1) Our QA should have a major focus on testing with these browsers. 2) Architecture needs to focus on this stat. as a guiding principle while deciding future architecture.
Another interesting statistics is the second screenshot with the Mobile Operating systems. 1) The highest share of internet browsers still run a Nokia Symbian phone. Most likely these are traffic from developing countries, where monetizing from these clients is extremely difficult. 2) iPhone and Android are tied and very close.
So focusing only on iPhone could be a mistake. We need to open up to focusing on Android just as much.