I have the Chromecast and some things are awesome on it. Unfortunately, it’s a limited device in that strictly speaking, the Chromecast doesn’t mirror content, it streams from the web. This means that outside of a few phones, you can’t project games to your TV, which I’ve argued could disrupt the games industry. It also means you can’t project your PowerPoint presentation to the TV.
That changes with Microsoft’s Wireless Display Adapter (awful, awful name). It uses the Miracast standard to mirror your Windows and Android devices to the TV so you don’t even need Wi-Fi to make it work. Check out the video to see how Microsoft wants you to use it: