Pretty much this. I said in the other thread how, even if Prometheus was only a new system that could play CV/SGM games, I would be more than happy with that. Obviously they are doing more than just that, but to me, it's a secondary, bonus appeal.
I mean, let's face it, the ColecoVision is getting on in years -- and these things weren't exactly reliable from the very beginning, either. And unlike the current alternatives available for something like, say, the far-more-popular NES (Analogue NT/Mini and retroUSB AVS being two great examples), the only way to play ColecoVision cartridges is with a genuine ColecoVision system. (Or that Dima 2-in-1 system that plays SG-1000 games too, but, those are crazy-rare and also pretty low-quality.) Sooner or later, most of the ColecoVisions out there will be nonworking plastic boxes, and maintaining them will only get harder. Same with a lot of other older hardware, really. Then what use are all those cartridges? Homebrew makers might as well stop releasing physical versions after a point -- and that saddens me, because I've grown to love the quality and care put into those physical releases. It's just not the same, dragging a ROM file into an emulator with barely a flick of the wrist.
So that's why I appreciate it, personally, that Opcode is taking the initiative to craft a modern CV alternative for not just the people who already love ColecoVision, but for people in the future as well, who may be interested in getting into CV collecting but can't because they can't find or can't afford a working unit. The fact that they are making it so that it can support its own, system-exclusive games entirely on top of the CV compatibility is just icing on the cake. Maybe I'm preaching to a more optimistic, idealistic mindset, but wouldn't it just be cool if we had a all-new new, retro-inspired platform to get behind? Something that, unlike similar software-based platforms like PICO-8, is an actual, physical machine that you can load cartridges both new and old into? Maybe I am a tad biased, but I think it's a wonderful concept.
It's not really about "why don't you just make games for [x] system instead?" or "why not just make a modded emulator box and slap a sticker on it?", it's about supporting and breathing new life into a platform we already care about, whilst elevating it beyond its original capability at the same. (At least, that's my take on it.) In a perfect world, people would be doing similar things for every other platform and system in general (a new Intellivision with nicer controllers, for instance ), but I'm really happy that it's happening for the ColecoVision now. I think it really needs it.