I kind of expected them to do this. But this isn't true bc, for one this will probably be a subscription based service and not a place the disc in a tray and it unlock it. This is based on what Sony has done in the past and that there is a cost to stream. Second don't expect the entire library to be there. The problem with Nintendo VC service will be faced by Sony. Last gen saw a few publishers and developers go the way of the dodo and new developers/publisher may have bought the rights to these IP. Also for developers that went under some other publisher may have bought the IP and the publisher for the original title can block the title to keep their competitor from getting money for a game they have the rights to. (It has and will continue to happen.) Sony cannot just unilaterally digitally publish a game. In the case of games that no one picked up the IP they cannot publish the title unless they buy it in the markets they want to release it. (Because the ownership becomes the bank's who still want to get some of their money back)
This should be viewed as a work around and not true backwards compatibility. It is nice but also limited by bandwidth and data caps in addition to the two above problems.
As for the subscription if they don't expect it to be free, it will either be lumped together with PS+ or they will created another level or two of service. (PS+, Gaikai BC, PS+Gaikai) Each with their own subscription setups.







