I doubt mics will have any real advantage with majority of gaming genres. I can see it being useful for specifying certain commands in an open-world game, maybe. Something like GTA6 could probably take advantage of it as a bonus feature in the PS5 version, like if you're trying to pick up a street hooker and talk to her, your voice is analyzed and they'll either want to give you a blowjob or walk away based on that. Like if you sound drunk, for example, they might turn you away or actually be inclined to go if you have booze in your car (but she'll get out and stiff you on the service if you don't actually have booze in the car). That kind of thing.
Basically, biggest use would be for subtle little things here and there that can add a bit more immersion, but it wouldn't be vital to the game design, and I don't see them being gamechanging things in influencing paradigm shifts in game design. The SSDs and especially expanded GPGPU programming will be much more influential in that regard, easily.
But for the latter of those tasks they aren't working with a lot of power whatsoever. 100 - 200 GFLOPs at absolute most, and it may even be to the lower end of that depending on how much was customized.
TBH we've already seen an example of this decades ago: on the SEGA Saturn, Camelot used the Saturn's sound chip for game logic (and some graphics IIRC) work in one of the Saturn Shining Force games. So same thing conceptually, though probably much tougher to do on that system and definitely using the chip in a way never intended. At best though, it was used for a small range of logic and graphics tasks, not heavy off-lifting from the VDP 1 & 2 or SH2 processors in the system specifically built for logic and graphics tasks.
I think you'll see use-cases for Tempest outside of audio of that level, for devs who actually wish to take advantage of it in that way. Which will probably end up just being 1st-party teams more or less.
