Many projectors make standalone Wi-Fi modules that plug into projectors and add wireless connectivity such as EPSON Home Cinema 880/EX3260/VS250/VS350/VS355. On the downside, these modules typically only work with the selected designated models, so they can’t be reused and shared across projectors. That means buying several modules or dongles if you want to use multiple projector models. In the pro column, Wi-Fi models also offer a very widely-compatible design that works with nearly every device imaginable in an OS-agnostic fashion. Most support Windows, Linux, Mac OS, iOS, and Android. That removes the need to buy both Chromecast and Apple TV, saving you money and clutter. If your office does lot of BYOD (bring your own device), this is an acceptable path, because it’s unlikely any device will have Wi-Fi issues with the projector, and nor will the projector have any problems getting on your Wi-Fi network.