Since it appears that the 93 will have the same hardware as the 73, improved quality is unlikely. The "5" series drives are very much an unknown, but should be out later this year, if at all. Since these will also now likely have MTK chipsets, don't hold your breath. :sad:
I suppose R9 speeds will be uprated further at some point, is there actually anything to stop them, and the RW speeds, from getting to the rotational limit of 16x ?
Yes, the inability to focus on 2 layers at those speeds will likely make 8x the limit. Not to mention that BR and HDDVD will have similar or faster datarates right from the start.