For the moment, attempts to see the news more than the Start screen did not go through.According to reports from a user who has explored the Lumia 900 with WP 7.8, for example, lack the ability to capture screenshots (present in WP8). Unchanged even the UI of the camera, which does not present substantial differences with respect to the current one.
It is not known if there are any changes are not immediately visible as those relating to the APIs used by the operating system release, nor is it appropriate to consider the exhaustive opinion expressed by those who have had the opportunity to inspect the sample exposed at the store.
The upgrade to 7.8 will be available for versions 7.0 and 7.5 shortly after the start of sales of the Windows Phone 8 smartphones. Among the features are the new Start screen, the sharing of the calendar using the function Club and access to key Microsoft services and content, including Xbox Music Store library that can be enjoyed by Zune and Xbox SmartGlass.