Only in those markets where computing is a fungible commodity, i.e. servers, is the flexibility of openness any benefit, and even there it loses some autonomy to black-box "management engines". While these are still the most plausible vehicle for open computing, I only see them as appealing to a niche of amateurs buying cheaper refurbished machines.
Some may tout stuff like the RasPi as a viable alternative. Sure, but with the understanding that the RasPi is a CPU riding along a beefy VideoCodec/GPU, which has taken years of (ongoing) effort to implement open drivers for, and the RasPi4 still remains 2x slower than my 15 year old laptop.
In other words, there is no viable consumer market for open computing.