Actually, while I agree 101% with Kronos, and we all know that asking for release dates won't bring them nearer nor will bring the actual answers, I feel I have to clarify that Radeon R500 support was actually showed live at Pianeta Amiga 2013 and support for R700 (HD4xxx) was already in the works. And Frank Mariak and Mark Olsen told us that the plan is to have them both completed for the Sam460 release. No promises nor announcements, and we all know that even the best plan can go all wrong, but if everything goes as expected, they'd like to release everything together in MorphOS 3.6, and they hoped to have it ready for the first half of 2014.
So, you can all stop asking, and wait for MoephOS 3.6. And if 3.6 does not include everything, *then* start asking what went wrong (and expect a simple answer as "sh*t happens").
That said, do not buy anything for MorphOS before a release happens. This has always worked perfectly for me.

Kind regards,
Andrea