I think Z launcher will giv a new user experiance...like how it would be..so for for the coming years, the users will be well aware of of Z launcher becz everyone will be trying. may be the OS wil be Andriod.. I feel Z launcher like Windows Cortana. studying the user and changing according to that and google integration to the start screen. As u said it will be a fresh start for Nokia. Some of the analyst said, Nokia planing to acquire handset division of Alcatel