Is this anything new?.. Looks good for 8K X…
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Yeah, but we now need more developers to create games, applications, experiences that actually make use of a dual GPU set up 
I question just how much this depends on the developer… Just like how Pimax can manipulate the drivers to get a 110 fov game to render at 200 fov, or how VorpX can get any game to render in stereo, there are options here.
I’ll bet if you had an intimate understanding of how the Nvidia VR SLI pipeline worked, you could hijack a traditional single GPU draw call and send it to both GPUs.
It depends on the developer because good multi GPU scaling is engine dependent, developer optimization dependent, and also most developers do not own multi GPU setups. Multi GPU support is baked into DX12, and still nobody has taken advantage of it. Even the GPU vendors have scaled it back.
I still believe it is possible to hijack the pipeline. If VorpX can take a mono game and make it stereo, it should also be possible to send a draw call to two GPUS.
Remember, everything needed to render two cameras is already happening (transforms/culling/etc…). It just usually takes place on one GPU. All we are talking about doing is splitting the work between two GPUs.
In theory, there wouldn’t need to be any changes to the game itself (the game doesn’t know and//or care if each camera is being rendered on one GPU or two).