Admittedly I don't know how TVs doing it, but I would think interpolation would need both frame 1 and 2 to calculate frame 1.5. If that's how it'd work, it'd defeat the purpose since you'd need to add a frame of lag.
Yup, lag is a definite concern. Then agian if PSVR allows for it then there's already a gaming application of the tech being used on something that's extremely sensitive to lag and it seems to work fine. If it's good enough to not cause a significant amount of lag for VR then it should be negligible enough for TVs
What your talking about is motion interpolation. It doesn't increase framerate at all. It is essentially a motion smoothing effect that creates fake frames to create something resembling a higher FPS. It doesn't make games feel as responsive as they do at 60 FPS tho, and in fact makes them feel far, far worse due to extreme input latency. It also honestly doesn't replicate the same smoothness as an actual 60 FPS presentation either, as you can still see judder and such in the image. It just isn't worth including Imo, it is not meant for gaming, and actually worsens the gameplay experience.
I think it also varies depending on what method of motion interpolation is being used. A method where a TV with a very high refresh rate does black frame insertion would of course not work on the console level when it's trying to take something like a 30 FPS game and bump it up to 60 FPS. And while it wouldn't give you the same sort overall experience you'd get from an actual 60 FPS game I have to believe it'll give you something superior to a 30 FPS one. I've played quite a few games with motionflow activated on my Bravia TV (mostly Destiny 2 at the time) and it did make for a noticeably smoother experience. If it could be done on the console end with a superior MI technique to my mid-range TV then it could at the very least be a good optional setting for games that would otherwise be 30 FPS. For the PS5 I dunno if it's as simple as Sony dropping one of their X1 Ultimate chipsets that're used on TVs (or a variant of that) into the PS5 and calling it a day, but it looks like all the pieces are there on some level. It's just a question of how good it really would be, how much it'd add to production costs and if they're even looking at doing this.
With PSVR reprojection is automatically done by the GPU by the PSVR API in conjunction with the current motion of the headset. The software needs to know the user headset current motion in order to approximately predict the location to interpolate a frame (from memory I think just the same previous frame) just before the next computed new frame. This is why the tech does not add input lag and can't be used on TVs (on TVs motion interpolation adds latency).
Ahh, thanks for the info. Do you think adding an interpolation method similar to those used by TVs in the console itself would minimize lag? Or is it unavoidable?