AV Watch managed to sit down with the PlayStation3 firmware developers and came away with some interesting information. Two of the features that are in the works are 1080 deinterlacing and DTS-HD MA support on Blu-ray. DTS-HD MA is the only BD audio codec not currently supported by the PS3, so support for it would make the PS3 the most comprehensive Blu-ray player available. Now, due to the HDMI hardware limitations it will almost certainly be handled like Dolby TrueHD, internally decoded and output as PCM. There are a number of other details about the current and future software, the Beyond3D Forums and PS3 Fanboy both have summaries (in English).
Picked up from EngadgetHD.