Amazon's 'Twitch' appears to be creating a service that operates like Twitter.

Even Apple, notorious for keeping a tight grip on its products, allows fierce competitors like Google, Amazon, Spotify, and Microsoft to offer their apps on its phones and tablets.

What's the third smartphone platform? Is it Windows phone? Is Windows Phone going to finally get off the mat in the developed world? Amazon believes their platform has a chance to become the third.

With Caavo, you don't have to know the device name, the network name, the service name. Just which show you want to watch, regardless of whether it's live, recorded, downloaded or streaming.

Slack users I know, including me, love many things about the service. As the company likes to brag, it's fast, it's transparent, and it's great for brainstorming.

Streaming TV shows, movies, and other types of video over the Internet to all manner of devices, once a fringe habit, is now a squarely mainstream practice. Even people still paying for cable or satellite service often also have Netflix or Hulu accounts.