As rumours about the new Apple TV circled earlier this year, one note in particular disappointed some A/V die-hards: the new set-top box wasn't likely to have 4K support. And that's exactly what panned out, as we saw this week.

But while Apple may be content to ship another 1080p box, Amazon might go ahead and push forward with a 4K streamer in the very near future. That's according to a new report that suggests a 4K-compatible Fire TV refresh is on the horizon.

The biggest clue is a U.S. Federal Communications Commission filing for an "HDMI Digital Media Receiver," the details of which mention playback of a 4K MPEG4 video file. The filing is listed under Quill Royal LLC from Boise, Idaho in the States - but it appears to be a shell company of Amazon. The company uses the tactic regularly to try and hide its hardware submissions from prying eyes.