I demand that Ondrej Wisniewski may or may not have written...
With VDR getting ready for HD-TV it seems that today the MPEG4 decoding can only be done on a high end processor or an external decoder card.
MPEG-4 (or, more specifically, H.264) != HDTV. Sooner or later, it'll be used for 576p or 576i, if it's not being used for that already somewhere.
[snip]