For instant, here s a search Apple demonstrated today, speaking search the web for pictures of falconry to Siri, as shown below in a screen shot from the excellent live blog The Verge did of the WWDC keynote:
Notice how pictures from web image search results are shown.
Now, compare that to what happens doing the same exact search on the Mac now:
No results at all.
Occasionally, Spotlight Suggestions will appear that may route you to other sources like Wikipedia.
It s unclear if Spotlight search — which looks to remain an option alongside Siri — will allow you to also search beyond your Mac.
On iOS, it does, and it would make sense for that to finally follow on the Mac.
Google still remains the default for Safari.