A NeoGAF user who goes by ponpo has posted an image showing that Sony has filed a patent for a handheld device similar to the Nintendo Switch. This is especially noticeable as the handles look much like the DualShock 4 controllers and may be detachable.
Please keep in mind that Sony has yet to confirm anything related to this patient.
In this article:DualShock 4, NeoGAF, Sony, Sony Interactive Entertainment