This is the status quo for PSP. Don't know whether it'll call PSN servers (some servers will of course need to exist for downloading in the first place), but otherwise it'll just be like using your PS3 offline, right?
The PS3 lets you back up content to a USB flash drive, and you can copy it to your PC from there (see also RPCS3).
The PS3 lets you back up content to a USB flash drive, and you can copy it to your PC from there (see also RPCS3).