Suggestion: Replace Search Key on the Navigation Bar with Cortana's icon

[SkypeGuy]

Since the search button on the navigation bar basically invokes Cortana, wouldn't it be nice to have the search key replaced with Cortana's icon? Cortana's icon looks way cooler btw. Also it sends a message that Cortana/AI is deeply integrated with Windows. And provokes us, users to use Cortana more often.
What do you think?

 

[EspHack]

cortana is not available for everyone and it can be disabled resulting in the search key invoking a simple search app like bing, also a circle doesnt mean anything to most users yet and android already has it

 

[JustRay76]

I believe many people would agree with me that there should be an option to completely disable that damn button or even replace it with custom shortcut. In 4 years of using Windows Phone i only "used" it by accidentally touching it with the side of my hand.