The big takeaway is this is good for consumers. Regardless of speeds, it means lots of cores at a low price for all types of users, whether they're gaming, streaming, home business, etc. And not just AMD, but Intel too. What I see is a lot of people are getting into the multipurpose bandwagon, in that they want to do everything on one computer. The want to play games, encode videos, host plex and Minecraft servers, create youtube content, all while working with large excel sheets, powerpoint content and whatever other stuff they need to work on at home. They want multi-cores, they don't want to be scared off by security vulnerabilities, and they want it all cheap.
The Ryzen APUs are excellent mainstream solutions. The usual question for the average consumer looking for a new desktop: "What do you want to do on it?" and they're answer is "Oh just browse the internet, watch Netflix, work on some resumes, and maybe play some games like Fortnite/GTAV/Witcher 3". Most of the time when they add that last bit in, they need to decide if they want to shell out for a GPU or gaming machine in general. You're not going to be winning any awards playing GTA or TW3 on an APU with details turned down, but at least they're no longer exempt.
I've been running my gaming rig from work PC part salvage for a while now (good salvage mind you), but with the Intel security fiascoes and promises from the new Ryzen, I decided to go all in a few months ago and get an all-AMD system up and running. I'm using a 2400g (which is more of a sidegrade, as it's basically equivalent to an early generation i7) as a placeholder now, until the best price/performance deal presents itself on the new Ryzen CPUs. I think we will be seeing a big push for multi-cores instead of single thread performance in the future, so I see the 12 core being a hot contender for the next few years.
What I am curious about still though, is motherboards. Early boards were flaky but seem to be rock solid now after they've worked out their RAM woes. However different manufacturers are saying different things about how their existing or new boards will handle the new chips, and I don't see a lot of coverage on that.
