[Updated - 19/9/2016]
According to discussions in Fibaro Forum, it isn't true that Fibaro HC can be made HomeKit compatible through software updates. For security reasons, Apple requires that HomeKit accessories use an embedded authentication chip in every HomeKit product.
This being the case, I can only see the possibility for a new line of HomeKit enabled Fibaro modules to include this chip.
All existing modules, as well as Home Center, can only be controlled via third party Homebridge - which is a HomeKit bridge compatible with iOS 10 and Apple Home app.
Some resource links below:
Check out a video on how I used Siri and Homebridge with my iPhone and Apple Watch to control Fibaro HC.
Below is a video on how you can add the Fibaro modules (via Homebridge) in the Apple Home app
So, Apple just launched 'Home' on iOS, Apple Watch and Apple TV to manage all your HomeKit devices. Find out what this means for Fibaro owners?
Based on the WWDC 2016 keynote, I was able to catch a glimpse of the list of manufacturers that work with Apple Home App. Lo and behold, I see the Fibaro logo on the top row.
Based on my understanding, Fibaro will be ready when Apple releases the Home app in the next few months, this is enabled through a Fibaro software update, no new hardware is required.
I look forward to controlling Fibaro Home Center and devices using Siri and directly from Control Center without launching the app. This is a definite game changer.