I have to saz that I fully agree with crumb in wht he says. Of course AGA is great and was a great invention back in the days, but since everything keeps on getting better, faster and looks nicer, you cannot use that old system anymore, and secondly, i think that this is going completly off topic, so yeah, i'm quite positive that there will be updates to the new AmigaOs, and yes, I think that what the developers of AOS4 are doing is a step towards making the position of the amiga look better. Of course, it cannot be seen as the final cure, but it is a good path they are going. So for me, i think there will be updates to AOS4, and there wil be more support towards the Amiga due to the A1 and other hardware that supports AOS4.
