doing some tests, i think i have found a solution.
Summarizing the problem:
1. with kendo v2014.2.1008 i can use mobile widgets in a web application without any modifications
2. with newer version of kendo, to use mobile widgets i have to create a kendo mobile application (with angular i have to add kendo-mobile-application directive and kendo-mobile-view element as first child, so inside kendo-mobile-view element add the kendo widgets and html page elements)
using this approch, the popOver widget work well, but i noticed some problems with other widget who render always as mobile also if i use desktop browser (ex. kendoDropDownList), so i found this solution:
i declare a tag for mobile application with nothing inside of it, and all html elements and kendo widget declared normally in another div element (not child of kendo-mobile-application):
html content with widget and mobile-widget
this solution seem to work well, can be a good workaround?