I think this could be an amazing tool for modders to get scratchbuilds done quicker, and I'd certainly use it to cut out sidepanels for my case. Even as an indie case designer, imagine the possibilities you have for one-off customisations! You could offer loads of custom vent options that normally would cost loads because of additional setup costs, and you can offer cases at a much lower quantity for a relatively feasible price. If your case is so niche that it only sells 10 times, it won't cost 500 bucks because all flat parts can just be routed out by yourself. That makes it possible to lower the minimum funding goal on a crowdfunding platform quite significantly. (At least in theory, you'd have to buy the router first and it has to amortise)
Do we know how much it will cost yet?