Rob Price, writing for Business Insider: Apps are eating the web. Over the past decade, there has been an inexorable movement from the open internet to the walled gardens of apps -- and this trend just hit a major milestone. According to new data from ComScore, more than half of all time Americans spend online is spent in apps -- up from around 41% two years ago. It's a stat that will be discomfiting to advocates of the open web, as well as companies whose core business is built around it -- notably Google. As content that was once freely available and indexable on websites becomes silo-ed away in closed-off apps, it makes it harder to search and link to content. This is, of course, the cornerstone of Google's original business.