With the advancements in steamlink, do you think we’ll be able to use more than one source to render? If I have 2 mid desktops, could steamlink get the resource and computing distribution along with the synchronization(or pre-rendering?) to use both machines to stream to my steamdeck?
Unlikely to be feasible for gaming as you will run in latency and overhead issues. If you want 60 fps, you have 16-17ms to render each frame.
At the bare minimum, you are probably going to lose a couple of ms from network latency from even the best home networking setups.
Then there is the extra overhead of maintaining state in realtime between multiple systems as well as coordinating what work each system can actually do in parallel. Full set of textures and other data will most certainly need to be on both, as having a shared memory pool across the network would be unfeasible. As a result, you will most likely have the same memory constraints, especially on the gpu, for each machine as you would just using a single machine.
