no new builds for Days now..

[Hykem]

i'm guessing it'll decrypt all the encrypted modules, files and stuff like eboot.bin, so there probably won't be any need for replacement drivers that still lack functions or have them set up incorrectly.

or, alternatively after they're decrypted the emu authors can learn more about them and implement everything they're missing in their own versions.

Precisely.

As a more immediate feature, it will allow JPCSP to load encrypted EBOOT.BIN files. Beware that not all files may be decryptable as this is strongly linked to the FW versions.
Another features being worked on for commit are savedata decryption and .PGD decryption (seen in Kingdom Hearts).