Cool!! and this is why Sony is helping to slow down the sale of it's Flagship system.
On two fronts in that matter.

1. The consumer gets to choose between an Expensive cool PS3 or a less Expensive and this less cool PS2 and PS1.
Since the Cool PS3 is unforgiving towards those with a strapped Budget the poor PS fanboy will choose the less Cooler yet affordable PS system and will also not take the extra effort to safe money to buy the cooler system since he/she has a choice.

2. The huge sales of the old systems as you stated will naturally not go unnoticed to the software developer and will put his recources in creating more PS2 and maybe PS1 games since creating games for the old system is far cheaper and bound to make more profit due to it's bigger installer base than the More Cooler but Program unfriendly PS3.
And as a rule of thumb. The more software for the system ( Especially new released Software ). the more the system sells.

And eventhough The PS1 and PS2 sales are Incredible. the profit Margin is so Mediocre, Sony is still not able to even reach a Breakeven ( Income equals loss = 0 profit ) because manufacturing PS3 especially after the price cuts Sony still loses $.
Yeay Sony sells alot of PS1 too but this also helps kill the PS3 which sony needs to get profit.
Sorry to burst your bubble dude.