In terms of how you do it, the Q&A on the blog explains that you can visit your PS4, head to settings, account management, account information, profile, and then online ID, at which point you can enter an alternative name.
If you want to check out the full list of games tested to support Sony's PSN ID change feature, check it out here. You can't change your ID using your PlayStation 3 or PS Vita. First, the price: although your first time is free, subsequent changes for non-PlayStation Plus subscribers will run $9.99 apiece, while PlayStation Plus members will pay $3.99.
You're going to want to think carefully before you finalise your new online ID. Players can also revert back to their old ID for free but must contact PlayStation support to do so.
You can't change the online ID for child accounts. Sony notes that it has found one game published on or after April 1, 2018, that doesn't support the online ID name change feature.
Gaming and tech giant Sony will finally let its users change their PSN names. However, since they have not all been specifically tested with the feature, we can not guarantee that they will support it.
A PS4 name change feature will launch later today, it has been announced. Reverting back to an old name is possible and doesn't cost any money.More news: LA Clippers: The Impact of Magic Johnson Stepping Down
Q: Will all PS4 games released in the future support the feature?
In October 2018, Sony pretty much gave all the details about the feature.
Enter an Online ID of your choice or choose from one of the suggestions. So while games published for the first time after April 1, 2018, should all work, not every single one has been tested.
The company say that users "may lose in-game currency whether paid for or earned", and could experience a "loss of game progress, including scores and progress toward trophy unlocking".
Parts of your game and applications may not function properly both online and offline.
The feature is a welcomed addition, despite the issues that it will present for numerous titles.