I really do not believe a price cut is coming. The general reason why is "money," but I can break this down in to a couple reasons:
1) Financial report. Cutting the PS3 price definitely hurts the whole company's bottom line now; keeping the price as is keeps the stated goals for the fiscal year in sight. Some people here do not realize how big a deal it would be if Sony came up 1 Billion+ dollars short on their projections for the fiscal year, which is about what a 100 dollar price cut on the PS3 would do.
2) Howard Stringer. The new Sony CEO has done nothing but jettison and massively restructure the Sony divisions which aren't working very well. Now, SCI has done well in the past, but this isn't a guy who's wringing his hands, standing around and hoping things turn out better later on. Your division is either making money now, or heads roll (as Kuturagi's already has).
I have a few other points, but these are the main two. It's clear to me that Stringer isn't playing around. I think he inherently dislikes the video games division -- he's been slashing unprofitable portions of Sony left and right. Given the cyclical nature of video games, where SCI will lose gobs of money every six or seven years (even if they make it back up later, which may not happen this time around), I think Stringer is looking to have stable, reliable businesses that provide a consistent profit.
It's hard to overemphasize how big a deal a price cut would be for the whole company. Basically, you're asking the entire company to take a massive hit in the name of the PS3's market share. That just doesn't seem like Stringer's game plan.