If copyright DOES apply in the US and the product was legally obtained (regardless of location) then the original copyright holder should again have NO right to prohibit resale, applying the first sale doctrine.
Where this gets interesting is, will this ruling apply to ANYTHING manufactured overseas that has any type of copyright, such as computing devices and automobiles? Imagine not being able to sell your 4-5 year old car to buy a newer model. How will this ruling apply to things such as the secondary market for used CDs (many of which are imported)?
I'm very curious as to how this is going to play out.