Ответ прост --- на MSDN:
Основная страница -
Microsoft Dynamics NAV 2013 Betahttp://msdn.microsoft.com/en-us/library/hh173988(v=nav.70).aspx
Три обзорные страницы -
Microsoft Dynamics NAV 2013 Requirementshttp://msdn.microsoft.com/en-us/library/dd301054(v=nav.70).aspx
What's New: Developer and IT Pro Changes for Microsoft Dynamics NAV 2013http://msdn.microsoft.com/en-us/library/hh174007(v=nav.70).aspx
What's New: Application Changes for Microsoft Dynamics NAV 2013 Betahttp://msdn.microsoft.com/en-us/library/hh173994(v=nav.70).aspx