This sounds like one more step to making push something that's expected on the web. BlackBerry did it to email when they created the "interactive pager", but it

This sounds like one more step to making push something that's expected on the web. BlackBerry did it to email when they created the "interactive pager", but it took a few years before people realized what was happening. It's great to see hot companies like Instagram jumping onto a coming wave like this to popularize it sooner.