Update: Update is live. Grab it via Network Update or direct download.

Sony’s announced that it will soon release PS3 firmware 4.21, an optional update that aims to “improve system stability.” Sometimes there are the under-the-hood changes with these sort of updates, but as it stands, things aren’t looking too exciting. At least it’s optional, right? Smart move on Sony’s part, as folks wouldn’t be too happy with a forced firmware update on a holiday.

We’ll let you know when the firmware is live. Then it’s back to waiting for PS Vita 1.80, which will actually add a notable feature – PSOne support.

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