Congrats Sony, you thought you'd force your customers to repurchase their favorite games didn't you? Instead you made enemies of an upcoming generation of gamers.
If only they could have heard the tears of the small children on Christmas morning upon finding out that they would not, in fact, be able to use the dance pad and the older Dance Dance Revolution which had the actual anime songs that they had saved their allowance to buy and they would only be able to dance to Lady Gaga instead...
(that's only slightly an exaggeration)