Still if it's constantly decreasing, why not just include one for the console? The $50 difference in PS3s is the difference between a 250GB hard drive and a 500GB hard drive. 32GB is an absolutely terrible decision considering how "digital friendly" the console supposedly is. I mean games can reach theoretically 50GB in size (dual layer "proprietary Nintendo medium") and when your native hard drive can't even support a single one of those (hell it would struggle supporting a single full sized 25GB game with all the system updates and what not) then you have a huge issue on your hands.
I mean you pay $350 for the deluxe system and what, $50-$100 for a hard drive because odds are you'll need one if you actually want to have digital software in any reasonable manner?
It's just a really unwise decision to go "Look we're not the Wii! We're digital friendly!" and then slap you with a hard drive that's incredibly behind the times.