Microsoft had to change Vista's startmenu search function to allow also third party desktop search vendors like the free "Google Desktop Search".
"Two areas have seen changes in SP1 that have come as the result of concerns from software vendors. One of these is desktop search; users will be able to change the default desktop search program to one provided by a third party instead of the Microsoft desktop search program that comes with Windows Vista, and desktop search programs will be able to seamlessly tie in their services into the operating system. These changes come in part due to complaints from Google, whose Google Desktop Search application was hindered by the presence of Vista's built-in desktop search. In June 2007, Google claimed that the changes being introduced for SP1 "are a step in the right direction, but they should be improved further to give consumers greater access to alternate desktop search providers"." -- http://en.wikipedia.org/wiki/Windows_Vista and http://en.wikipedia.org/wiki/Google_Desktop
Win10 should support third party personal agents like Google Now and others!
Microsoft had to offer a browser selection dialog with several third party browsers in Windows 7 - in Europe (EU). Though the removed it again last year.
"Two areas have seen changes in SP1 that have come as the result of concerns from software vendors. One of these is desktop search; users will be able to change the default desktop search program to one provided by a third party instead of the Microsoft desktop search program that comes with Windows Vista, and desktop search programs will be able to seamlessly tie in their services into the operating system. These changes come in part due to complaints from Google, whose Google Desktop Search application was hindered by the presence of Vista's built-in desktop search. In June 2007, Google claimed that the changes being introduced for SP1 "are a step in the right direction, but they should be improved further to give consumers greater access to alternate desktop search providers"." -- http://en.wikipedia.org/wiki/Windows_Vista and http://en.wikipedia.org/wiki/Google_Desktop
Win10 should support third party personal agents like Google Now and others!