Even in PACE, I don't think it means commoditization. That said, over time I've found anyone really technical pays absolutely zero attention to Gartner. With no judgement implied, they generally seem to target non-technical people who just want some jargon and product names that will help them sound like they know what they're talking about. They also get paid by the companies they are evaluating which means they'll almost never tell you about smaller players/startups who don't have the budget. HN or Reddit are probably both better for getting a read on who's actually doing innovative stuff.
There are also many companies making "unique" chips that are sold as COTS - it's a false dichotomy. Aside from a few initiatives like RISC-V, I'd venture to say most are proprietary.