Plenty. Enough that he risked it, and tried to cover his tracks. I know you're just taking the opportunity to shit on Apple and get a pat on the back for it, but painting it as 100% failure from top to bottom just isn't reasonable. Surface level focusing on prior art has you described deliberately misses the point. By that logic there will never be another significant innovation in cars, since prior art at getting from place to place is in the can.
The only interesting thing about the hardware, IMO, would be details about the internals of the custom silicon used for the image pipeline. And even that probably isn't all that interesting. Beyond that, The hardware is just a glorified iPad and a Quest 3 bolted together, with slightly higher resolution marred by slightly worse optics.
Most of what makes Vision Pro interesting is the software, and that isn't fully baked, making it somewhat less interesting than it otherwise would be.
It's not that Vision Pro is a 100% failure from top to bottom. It just doesn't do anything groundbreaking compared with hardware that costs almost an order of magnitude less, and it is a total marketing flop as a result.
Apple failed to understand the market. They didn't want it to be seen as a device primarily for gaming, so there aren't enough games available. They wanted a closed ecosystem, so they made it support only iOS apps (and only a subset of those), rather than Mac apps as a true spatial computer would. They naïvely assumed that wireless connectivity is good enough, resulting in a device that can't be developed for by users without a paid developer program membership (which means that those of us with corporate tech jobs can't tinker with them for fun) and ensuring that screen sharing with your Mac is flaky as h***. And so on.
And so they built a massively overly powerful device without any clear use case, when what most people would rather have is a larger-display version of Google Glass for consumers — real-time translation, real-time hints about who people are, real-time information about things they see, and being able to watch a movie while they are out for a walk without holding up a device the whole time.
They completely missed the mark, and as a Vision Pro user, I genuinely can't imagine why anybody in their right minds would want to steal their tech, much less the company that makes SnapChat.