Sony had an Xperia gaming event earlier today where it announced the Xperia Stream – a cooling case that’s compatible with the Xperia 1 IV smartphone and which also doubles as a streaming rig. The accessory plugs into the phone via USB-C and brings a full-sized HDMI port alongside a LAN port, headphone jack and a USB-C port on top. It does not feature any additional buttons or joysticks so you are still doing the actual gaming on the phone's display.

The HDMI port can help you output games to a monitor or TV with video output capped at 1080p resolution and 120Hz refresh rate. You can also hook up a capture card to record and stream your gaming battles. The cooling fans built into the case offer programmable control via the Game enhancer menu.