Normally, HomeUX works as a client/server application:

1. The user interface (a Silverlight application) runs in a browser, or on a touch screen that's a secondary monitor on a Windows PC.
2. The home control server runs on any Windows PC in the home.

The HomeUX demo is a bit different—the entire demo runs within the browser (as a Silverlight application), including:

1. a user interface—designed for a touch screen, but it works on a regular screen;
2. the full HomeUX home control server;
3. a set of HomeUX-compatible drivers;
4. a set of hardware simulators—the HomeUX drivers control this simulated hardware instead of real hardware.

When the simulator launches, you'll see a yellow hourglass in the top-right corner until initialization of simulated hardware is complete.