It won't be Super AMOLED Plus screen. It will be Super AMOLED HD screen using Pentile because Samsung has yet to be able to make non-pentile HD screen. The first one to use Super AMOLED Plus HD screen probably will be GS3.
I'd like decide between Skyrocket HD and the soon-to-be released GS3 instead of One XL. But god knows when GS3 will be released in US.