New details on the so-called Sony Ericsson PlayStation Phone have emerged, with the handset tipped to use BRAVIA branding for a display that’s supposedly on-par with the iPhone 4’s Retina Display. According to MobileCrunch’s source, the handset is on track for a Mobile World Congress 2011 launch in February next year, since it is “no where near ready” for a holiday 2010 release.

What’s left unclear is how the phone will be branded; it seems Sony Ericsson will be sticking with their XPERIA name, since the PlayStation Phone most likely won’t be able to run actual downloaded PSP games. Instead, it will get custom mobile games, specially created for the platform and priced at sub-$10. The handset itself is internally expected to come in at around $500 unsubsidized, including a five game bundle.

As for “Z-System”, that’s supposedly the umbrella title for both the Sony Ericsson gaming platform and the distribution system, and it’s undecided whether games will be distributed separately to the Android Market or, as Google is apparently pushing for, in a new, custom section of the Market. The tipster – who apparently has a track record not just of successful information but with mobile gaming – reckons it’s “the best gaming experience [they’ve] ever had on a mobile device,” which leaves us eagerly anticipating MWC in a few months time.