The demos are a trick! maybe.
I think Sony might be releasing these commercial game demos in order for homebrew developers such as booster, to push for new firmware emulation on the psp in order to find anything they may have missed before releasing the firmware with the psx emulator.
I dont think a new devhook should be released for 2.81 incase the same exploit is still there in the new ps emu firmware.
A new devhook will reveal this exploit to sony, and they will patch it, making things a lot slower on the homebrew front.
No?