According to Yifan Lu, it is technically impossible to run ROMS. Direct quote:
"You can load homebrews but it is physically and technically impossible to load ISOs/backups/pirated content/roms since we dont have kernel access. In addition those stuff are encrypted and we also need kernel access to even think about decrypting."
Loading ROMS in HBL for PSP works though, but i'm not sure if it has kernel access or not.
Need to wait for more info.
Has he breached Content Manager ? If not, people will have to download the binaries via a web browser URL.
It looks like Sony can block this once they found out how it works.
In any case, I think this is generally positive. Doubt the software sales will be impacted.