As others have pointed out running it on a traditional socket would just bottleneck it so badly as to not give better price/performance anyway so the cost really doesn't matter.
AMD would need to sell the board this would be attached to and may as well solder the RAM on as well at that point. Congratulations, AMD, you've invented your own Mac without having your own OS.
Maybe some PC manufacture might decide to release something like that, but I wouldn't expect it to be a major release. It might make a nice Steambox or living room PC that replaces a console, but I don't see them investing too much into something like that. It doesn't have the volume potential to reduce the cost of making it and the higher price it will need to have to turn a profit mean that it will have low volume.
I'm not suggesting they use a regular AM5 socket either. Just that using Threadripper MBs ruins any chance of beating conventional CPU plus dGPU pricing.
They are better off soldering it in. Yes it is much like Mac HW at that point, but some claim they want that.
Many people overestimate the benefit of the Big iGPU x86 SoC, and have been clamoring for something like this for MANY years, assuming it will be less expensive than comparable CPU and dGPU, and be a great budget gaming platform.
I've never been that optimistic. Because you have one locked in, VERY expensive chip that will likely end up in niche volumes. This is NOT a recipe for budget pricing or success.
The main thing AMD seemed to lean on in their presentation was a big memory pool for AI. If it wasn't for all the AI hype I wonder if they even would have built it.