Now that the Developer Tools (see yesterday's blog) are available, the first useful tool is System X-Ray. When turned on the information at the top of the screen seen below overlays what you're watching and displays the resolution, in this case, 2160p (4K), and the frame rate (59.94 frames per second). It also displays the amount of memory being used and network statistics including wireless signal loss and throughput in Mbps (Megabytes per second). On some Fire TV devices, the CPU utilization is also displayed. And in case you're wondering what the "HDCP 2.2." is all about, that's the version of copy protection being used between the Fire TV and the television, which prevents illegal copying.