I can't say I'm personally too interested in mobile GPUs. I know they're a very different architecture than Desktop GPUs and have some important optimizations with regards to memory bandwidth. (Desktop GPUs can just run higher-power RAM for more bandwidth, IIRC Mobile GPUs need to rely upon optimizations that Desktop GPUs simply don't care about yet). EDIT: Oh wow, now that I'm done reading the .pdf, I think they did a good job explaining this in comic-book form.
I can assume though that video game programmers who optimize for specifically mobile-GPUs can get a graphical advantage over their competitors though. So even if its not my cup of tea, its probably very useful to others.
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On the "Manga Guide" perspective: these books are a lot of fun and I feel like they're a good introduction. As a comic-book format, they are very quick to read.
Its hit-and-miss though. "Manga Guide to Linear Algebra" is awful and uninspired. Skip, just not worth your time.
But "Manga Guide to SQL" is great. I think the story about the Princess trying to organize Apples in her kingdom (and thinking about customers, businesses, etc. etc.) very naturally teaches SQL. So much of SQL and Databases are about learning a hypothetical business, that a grand story about a Fairy, a princess, a kingdom losing money that needs more organization (etc. etc.) really helps out.
Knowing that Customer's Address and how it can conflict with other customers in 1st or 2nd normal form, but how 3rd normal form fixes the possible conflict (etc. etc.) solidifies SQL ideas and theories with a story.
I think that's the key. Some subjects (and authors) are able to properly weave a story into the explanation. A subject like Linear Algebra probably can't have any story weaved in, so they kind of failed at that. SQL does, and I think a "Mobile GPU as a factory / tour of the factory comic book style" could make sense.