Your analogy isn't quite right. The DS and PSP have been on the market for just over 2 years. Most console cycles of 3 years. So we'll see the next handhelds in late 2009 or 2010. Most successful consoles will keep selling for at least a year after it's successor hits the market. This is especially true for handhelds. So that puts at late 2010 or 2011. This analysis is estimating to the end of the DS/PSP life cycle, not beyond it.

The DS has been beating the PSP BADLY in sales for the past 10 months... That's why everyone is having sales on PSP games, because those sections aren't making any money and are being phased out. People aren't buying PSP games because the "new load of great new games" that were supposed to be on the horizon never showed up. Other than a very very few exclusives like MGS Portable Ops and Final Fantasy, everything is still just weak ass ports of PS1 games. And not even any of the best selling PS1 games. If Sony brought out all the great PS1 titles for PSP, I would have run out and bought one instantly. Also, now that Sony has their new cutesy ROM set that doesn't allow you to play homebrew and emulations of PS1 games, sales for the PSP have dropped even further. Now the old PSP motherboard versions are worth $500 and up JUST FOR THE MAINBOARD, because nobody wants a brand new crippled PSP for $129. Sony, you have chosen....poorly.