Quite an interesting idea – to execute PHP scripts in Windows as regular exe. Behind the scenes it uses IE component, but there is no IE toolbars and you have a control on windows your application uses. Also you can create an installer, so it will look for user as a regular windows application.
These days a lot of applications are actually switching to web services, so you actually do not have to install software, you can just use it from your internet browser. But I can still see quite a few uses of this tool to create client site components for the application.
So, will keep this in mind and may be one day will use it not just to play.