Your web application is all shiny and new - it uses the perfect combination of the new cutting edge API everyone’s talking about, and a few old standbys. The only problem? You keep refreshing the page to see if something happened. You know, if someone signed up, or posted, or commented - or whatever it is your application does.
Those real-time APIs are for much more than just the sample chat applications.
The number of services offering real-time APIs is slowly but surely expanding and it looks like we're going to have to add quite a few more. Since the start of the year a new type of service has started to appear--client push services, which help developers include real-time updates in their web apps.