It looks like a way to enable 'click-to-play' by default without over-annoying users (normal 'click-to-play' sometimes shows the Flash experience even when an H

It looks like a way to enable 'click-to-play' by default without over-annoying users (normal 'click-to-play' sometimes shows the Flash experience even when an HTML5 experience is available). It's also good for security as it makes it more difficult to exploit Flash vulnerabilities (especially in ads). It may be the first step before sunsetting Flash completely as you suggest.