Windows 8 is designed for new touch interface devices. You can operate Windows 8 using a touch screen, or keyboard and mouse, and you can toggle any point of time.
Windows 8 comes with built-in apps which include Mail, Calendar, SkyDrive, Messaging etc., Internet Explorer 10 for faster browsing experience. You can download apps, games etc. available for Windows 8 Consumer Preview and are free and can be downloaded by visiting Windows Store.
To download Windows 8 Consumer Preview click here
You can also download the product guide here