The Threadrippers are proper dual-CPU systems with two Ryzen chips on a single carrier, with each CPU having local resources (cache, RAM, PCIe lanes, …) so the OS or an application have to take care a load doesn't get shuffled between the discrete CPUs or there will be performance penalties when one CPU has to access resources of the other.
Assuming process scheduling is sane, and the Win10 autumnal update is supposed to cater to that, it should be alright, but those systems are really more interesting for multi-process loads or attaching lots of storage or GPU compute through the many PCIe lanes than for stupid consumer tasks like games. On the upside, you could run several separate video encoders (for example you should not feel any impact from having OBS stream to several platforms at once while still keeping a high-quality local recording with multi-track audio), a bunch of virtual machines, and a moderately attractive database server in parallel with a game.