Relax, it's already been confirmed that Sony is supporting second hand gaming. Which in terms means "used games" However, the ps4 will not be backwards compatible with ps3 titles or accessories. Unless they went to cartridges or memory sticks for their games, expect a disc drive. Besides, Blu Ray is a big part of Sony, there is no way they would leave that out. But yes this has been confirmed in a small interview the day after their Press conference last month in February.
I love 10, but a fully remastered title is unneeded...it is fine just as a port for a download, What i really want to see, is a remastered Chrono Cross, and final Fantasy 9!