Google will kill off Google Wave, they told in a blog post . It was a technically very inspiring web app which, however, arrived without any particular and clear use case. This caused not only interface usability problems (Wave was good at allowing you to do a lot of things at once, but it often wasn't really good at anything in particular, e.g. plain chat when needed). It also caused social frictions as people were using the tool with different, colliding expectations .