The PS3 is not the best selling console in the world. That title goes to the 3DS. Yes, it is currently the best selling home console, but that's not going to last for too long. As the Wii U gets more games, this generation winds away, and as the PS3 dies more and more, eventually the Wii U will begin to outsell the PS3. I'm not sure when this will happen, but I'm sure the Wii U will outsell the PS3 during the holidays, which is the most important time of the year.
Passing the 360 yeilds no advantages for Sony or consumers. When the PS3 passes the 360, it's only going to be by a tiny amount, so it's not going to change the grand situation. Developers & consumers aren't going to abandon the 360 and switch to the PS3. Nor is Sony suddenly going to start making more money. However, the disadvantages of such a move are quite serious. You give both the Wii U and Nextbox an even bigger headstart than what they would have otherwise. You also leave the PS3 as the primary Playstation console even though it's going to be practically dead during 2014. This simply isn't worth it when they are no advantages at all.
The PS3 is in a steep decline. In 2012, the console sold only 11.8m units, which is down 16% even with the new Slim. This year, it'll drop even harder meaning it'll sell ~9.5m or less, especially as this generation dies. 9.5m isn't too bad if the PS4 is also releasing this year, but if not, then those are some worrying sales. That means the PS3 will be the primary Playstation console during most of 2014, when it'll sell even less - somewhere around 5-7m I think. These sales simply aren't sustainable for the primary Playstation console. It makes more sense to get the PS4 out when the PS3 still has some life in it (this year) rather than when it'll be dead (next year).
Sony should not focus on power next gen. When they did focus on power with the PS3, it only gave them a minuscule advantage over the 360, and resulted in an extremely expensive console. You seem to have forgotten about how poorly the PS3 did during the first half of the generation. Either that or you're posting from a fans perspective rather than a business perspective, which it seems you are. Sony needs to go back to their PS1/PS2 strategy and ditch the focus on power altogether imo.
Yes, Sony said they've never been first or the cheapest, but so what? First of all, they didn't even make a claim, they just noted a trend with their hardware. Second of all, even if they made a claim, that means nothing. Remember when they called the Wii a fad? Yeah....Third of all, they can still release a PS4 this year at >$300 and they wouldn't be first or the cheapest. This quote doesn't support your argument at all.