Recently kirbasin spotted in the Unreal Engine 4.14 release notes from a PS4 *** update indications that suggest Sony may be planning to allow users the ability to change their PSN ID account names. 
To quote: "Looks like Sony is making changes to make sure games retrieve PSN ID via internal account ID which would allow to unbind data from display name. Could this mean we can hope for PSN ID changes in the future?
Still a big question on how it's going to be handled for the old titles and platforms, but looks like some progress is being made."
And from the document itself: Refactored the PlayStation 4 Online Subsystem engine plugin to support PlayStation 4 *** version 4.008.061.
Deprecated the use of “Sce Np Online Id,” replacing it with “Sce Np Account Id,” as per Sony's recommendation. Online users are now exclusively identified by their “Sce Np Account Id.”
Simplified the handling of unique net IDs across the PS4 online subsystem.
Switched from “Np Toolkit” to “Np Toolkit2,” to support the new APIs which work with “Sce Np Account Id.”
Added asynchronous name resolution to convert between “Sce Np Online Id” and “Sce Np Account Id,” using Sony's ID mapper web interface.
For PlayStation 4 online users, the “To String” and “Get Bytes” functions in “Unique Net Id” now return the user's “Sce Np Account Id.”
Previously these functions returned the user's “Sce Np Online Id.” Any custom online code or services backend will need to handle identifying users by their “Sce Np Account Id,” as according to Sony's recommendations.
If required, the “Sce Np Online Id” for local users and friends can be obtained via the “Get Display Name” interface in “Online User.”
Thanks to VG247.com for news on these rumored PlayStation 4 *** version 4.008.061 PSN ID account changes!
To quote: "Looks like Sony is making changes to make sure games retrieve PSN ID via internal account ID which would allow to unbind data from display name. Could this mean we can hope for PSN ID changes in the future?
Still a big question on how it's going to be handled for the old titles and platforms, but looks like some progress is being made."
And from the document itself: Refactored the PlayStation 4 Online Subsystem engine plugin to support PlayStation 4 *** version 4.008.061.
Deprecated the use of “Sce Np Online Id,” replacing it with “Sce Np Account Id,” as per Sony's recommendation. Online users are now exclusively identified by their “Sce Np Account Id.”
Simplified the handling of unique net IDs across the PS4 online subsystem.
Switched from “Np Toolkit” to “Np Toolkit2,” to support the new APIs which work with “Sce Np Account Id.”
Added asynchronous name resolution to convert between “Sce Np Online Id” and “Sce Np Account Id,” using Sony's ID mapper web interface.
For PlayStation 4 online users, the “To String” and “Get Bytes” functions in “Unique Net Id” now return the user's “Sce Np Account Id.”
Previously these functions returned the user's “Sce Np Online Id.” Any custom online code or services backend will need to handle identifying users by their “Sce Np Account Id,” as according to Sony's recommendations.
If required, the “Sce Np Online Id” for local users and friends can be obtained via the “Get Display Name” interface in “Online User.”
Thanks to VG247.com for news on these rumored PlayStation 4 *** version 4.008.061 PSN ID account changes!
