If you look at the ipod, where the ipod classic has maxed out at 160gb and hasn't seen a refresh for 2.5 years you can see that they don't cater to the top 0.1% of users.

What they might have a problem with though is convincing the average user that their computers with 256 gb are actually better than the really cheap windows machine with 750gb, to a user that does seems like it's 3 times better.