If you want to see talks about that "critical topic right now for" you, or even work done in that area, the surest way to get that is to put in the effort yourself.
Maybe the shout-out on this platform encourages somebody (e.g. you?) to present on the subject next year - that would be a win in my book.
The people and projects surrounding the OSFC has been working tirelessly for many years on changing things for the better. I can personally attest to the fact that the people involved are incredibly passionate about open source firmware.
Making firmware open source benefits vendors AND users. It serves commercial interests AND software freedom.
I don't mean to nitpick, but people that actually care about the future of technology and want to make things better usually talk in specific terms rather than throwing out unspecific terminology.
That said: 15 years of activity is a lot of work to unpack in "specific terms", so "unspecified terminology" that still provides a rough overview it is.
How about list of open firmware(preferably consumer grade, big corps can get it anyway) that you helped or developed?
And if it is so good, why more and more hardware needs closed firmware?
As for "why more and more hardware needs closed firmware": In 2005, which PC started from open source firmware, outside select data center deployments?
If you want something 'specific' then I would point you to the Open Compute Project that has now basically mandated that certified servers allow consumers to install alternative fireware. That required a lot of effort and lobbying.
At the same time creating a community of users and vendors that enable new platforms before they are even released. Go look at the coreboot git to see this work.
The lobbying of the community has lead to AMD next generation boot firmware, OpenSil to be open source. Again, this didn't come out of no-where.
Thank you. Now that sounds like it's more up my ally.