Could non-downgradable PSPs be coming to retail stores?

According to Nadclovek from PSP-Spot, new shipments of Playstation Portables will be coming to stores with a higher firmware (4.xx) They will be sold at the retail price of 169.99 CAD or around US$ 153.67. Although its a good price to par for the unit this could mean no homebrew, that brings me to the question; is it worth it?

Nadclovek says:

"Sony was sending out Emails to its Commercial Retailers that all new PSPs to be sent out will have 'Downgradable Prevention' built right into them. All new PSPs to be shipped out as of next week Friday, May 18th, will be a higher firmware, 4.xx (specifics were not released), but they were promised to include new security features to prevent hacks and downgrades. Apparently this is one of their first steps to start focusing on the PSP again, instead of diverting all attention to the PS3."

Keep in mind that this is only a rumor for now, but this would not be good if it was true because it could end any homebrew chances on new psps.