The blog context is made clear in the second sentence "With the release of the iPhone X, I set out to see if I could observe these heterogeneous cores in action.". If the context was "Here is the current state of heterogeneous computing on mobile devices", you might have a point.
As to whether its innovative or not, Surely, you agree that designing a chip is more than just the bumper sticker definition of "it has cores with different speeds". But maybe you're right and it isn't innovative at all. It would be interesting to find out.
>This is not particularly innovative ground, and to write a whole blog post without even mentioning the fact or doing a comparison with any of the existing devices implies that maybe the author didn't do enough research.
I don't think it implies that at all. If a C++ dev is excited about a new C++ feature and writes an article, it doesn't mean they're automatically ignorant about other languages that already have this feature.
Whether that's worth being "rude" or not is an exercise for the reader.
[1] Edit to add: and producing fairly "meh" results as far as power consumption goes vs. their more conventional quad-core competitors. Honestly it's not impossible that Apple found some tricks to exploit here that the other SoC vendors haven't, but this post didn't find them.