I would rather Sony focus on getting their Online service where it belongs. Home is… where, exactly? Right. If customers want PS2 support, Sony already has a solution: buy a PS2. They’re cheap.
Much more importantly: customers who want to buy a PS2 are not the same who want to invest in a PS3… so achieving 100% perfect PS2 emulation on a PS3 is pointless, because Sony would lose those PS2-only shoppers. If they actually wanted (or could afford) a PS3, they would have done so already.
No, the only real solution is for Sony to focus on increasing marketshare on the PS3 by creating or buying exclusive content, while at the same time let the PS2 run its course. Sony is already doing everything they need to do. What they REALLY need to do is lower the price of the PS3 by $100 to make every Xbox 360-only owner pick one up. If more units are in core gamer’s hands, then the easier it will be for some developers to provide more exclusive content.