That is right. The ideal situation would be that the Paypal integrates the bitcoin in its payment system and people can use the Ebay.
I don't think that this is going to happen. Because block chain itself is already a paypal service for bitcoin. And I don't think paypal is going to adopt bitcoin as they are just referring and depending on the fiat money. Because they are not going to risk their service into something that is not stable at all they are just like amazon.
Have you read some news before that the management of coinbase and paypal are trying to collaborate with each other and have some good business? I think that it would be the start there would be limited access to each big whales but thats fine as long as bitcoin is starting to be integrated.