I confine this to NA chartz, where yes the ps3 is selling badly. compared to the 360 last year at the same time it is behind, even with the price drop. now this is not saying too much, christmas could change all of this. to compare to last gen, the 360 is outpacing original xbox adoption significantly enough for ms to be happy (though that only started after christmas o6). the ps3 has an adoption rate of about half the original xbox, though this two could change with christmas.
to view this compare the 360, ps3, and xbox align launches
this hurts ps3 in terms of developers, while NA may represent a minority % of systems sold, i am willing to bet that it has a higher attach rate than most other territories. i could see japan handheld market being bigger though. So it will lose developers like ea and ubisoft, or be relegated to 2nd and 3rd tier development.
as noted by many others this gen could start a separation of markets where developers more selectively market, leading to say developers making the ps3 lead platform for hd in japan, 360 in NA for hd, leaving the battle ground to be EU for everything else.
Now if you look at EU adoption rates, compared to the original xbox, until recently the 360 was out stripping the xbox, ms needs to change that, the PS3 is tracking about the same too, so any change there could be massive for both of them.
the bundle pack seems to have kept demand stimulated and barring a price cut for the 360 in the EU could be the difference