As the Xbox Live apps do not work in every country, I want to give you a short view to both apps. Both are preinstalled on W8CP.
Xbox LIVE Games
The Xbox LIVE Games app comes with a few functions which you might know from your Smartphone app. Once you start the app, you will get to the overview screen:
As you can see, your Avatar (if you have one), is loaded into the app. You can view your own profile as well as have a look on your friends profiles:
On your profile you can see your achievements or modify your avatar. If you choose a friend, you will be able to compare your achievements:
Here is a look on a friends profile:
Currently, you cannot send or view messages within the app like on the smartphone app. Hopefully this app will be updated during the preview time to fit with the smartphone functionality.
The Xbox companion is very similar to the one on Windows Phone. Once you have logged in and connected to your Xbox, you will see a start screen with your last activity as well as your last played games:
You can scroll through videos. games and music as well:
Finally, you have the search, like on the smartphone app:
Again, please remember that the W8CP is still a “Beta”-release, so it is usual that not all functions are working. I am sure the apps will be updated – at least with the official launch of Windows 8. I hope you liked this small overview over both Xbox apps. Feel free to leave a comment if you want to.