Blu-ray players support 7.1 audio formats and high-quality, lossless surround sound. While your high-def disc player and receiver may be able to decode these new surround sound formats, not all discs you play will take advantage of them.
You can choose to store your files on your Chromebook or online with a cloud-based file storage service like Google Drive. With Google Drive, your data is stored in Google's highly secure data centers. The Terms of Service make clear that what belongs to you stays yours..
The Chrome app launcher can bring Chrome OS to the Windows desktop, but Chrome can now replace the Windows desktop entirely. Rather than create native Windows 8 apps, Google is choosing to shoehorn the a Chromebook-style desktop into Windows 8. Of course, you can continue to use Chrome on the desktop just like before.