PlayStation 4 was announced to have no backwards compatibility in E3 2013, but an anonymous source at Eurogamer has stated Sony plans to release PS1 and PS2 games over the PlayStation Network.
These games are opted not to be used with the recently announced PlayStation Now service, the source said, but to be powered by local emulation, much like how the PS3 handled its Classics library over the PlayStation Network. Sony are also actively looking into rendering these games at native HD resolutions, which means natural upscaling to these levels.
Sounds like exciting stuff if it gets off the ground, but if they truly are targeting HD remastering solutions, a wholesale implementation could take a long time, if not outright be out of the realm of possibility, which can only lead to a light release schedule. To say nothing of the fact Sony hasn’t officially announced anything. Time will tell.