Startups wonder: When will they stop the presses?

"Most U.S. print newspapers will be gone in 5 years." – USC Center for the Digital Future, Dec. 14, 2011 "We'll continue to have a newspaper 7 days a week for many years to come…" – Mark Thompson, CEO, New York Times, March 26, 2014 So how many more years will newspaper presses keep rolling? I know. This is a bit of a fool's errand. It's impossible to know. But it's also an important question – both a marker of the media revolution's course and an imponderable that news startups wrestle with as they imagine their futures. I found myself…