I think that what this means is that because Amazon is no longer in California - they have no warehouses, offices, or salespeople (the affiliates) in the state, the state has no jurisdiction over them, meaning, CA can't force Amazon and their affiliates everywhere else to collect sales taxes on purchases by California residents.
So, for California residents, we can continue to order products, knowing that they will come from out-of-state sellers who won't be collecting taxes.
It will be interesting to see what happens next... Will CA blink and rescind under pressure from the affiliates who've been cut off? Will other states think twice about forcing businesses to be tax collectors (and thieves)?
Or, will the states led by CA ask the federal government to pass a federal law? At least one of these is in the works.
What do you think? http://consequeries.com/