iCloud Integration – iCloud integration is improved in Mountain Lion. As you can see, you get to choose which apps specifically share information through iCloud.
iCloud Integration – The rest of the available iCloud services. Note that Back to My Mac and Find My Mac services weren’t running and available yet.
iCloud Integration – Notes can store data in iCloud. You can open iCloud Settings from Notes to get access to the preference pane that contains all the options. Currently however, you can’t use your Apple ID as your iCloud email address, which makes things a bit difficult…
AirPlay Mirroring – AirPlay Mirroring allows you to push your Mac’s display, through AppleTV to your HDTV. This is an easy way to get the content of your PC on your TV, provided you have a second generation or later, AppleTV on your home network.