They had no BC on PS3 (most of the time) and it didn't hurt them one bit. Why should they waste money on this?
It would be perfectly possible to build a PS3 emulator, you just need a lot of time, a lot of money and some seriously skilled programmers. You would have to use a shitload of GPGPU to emulate the SPE units, but that is really the main issue. It should be no problem to emulate the graphics chip of the PS3.
About PS Now, the infrastructure for that service is expensive as hell. That's also why the prices aren't so cheap as many would like them to be. No way they are letting millions of users play free of charge, they would have to build another 2 or 3 server farms for that. At the very least.
Just keep your PS3 and everything's fine.
唯一無二のRolStoppableに認められた、VGCの任天堂ファミリーの正式メンバーです。光栄に思います。
