What about grammar now?
Anyway, Sony took the easy approach and instead of doing "internal" upscaling that involves directly hacking into the executing codes to do stuffs that would otherwise improve the graphics dramatically, they just take the output picture (the completely rendered frame) then... upscale it using a certain pixel filter. I can't tell which it is, but it ain't Bilinear as far as my eyes can tell. At least their filter does a better job than most internal filters in most LCDs. I could tell from playing a PS2 game on a real PS2 versus on my PS3.
If they directly hack into the drawing routines, then there might be interesting results.
Something like PCSX2 for instance.
For now, it's true that Sony isn't doing much to the BC department. Let's see how it's going to play out in the future.
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cChip interpreter WIP - current status: Release Candidate
LRx Filter RC - current performance rating: 9/10