I wish we could get people to fully understand what is going on here.
Dev Preview is only for the OS .... > WP8.1<
Cyan is for the Firmware...... >Hardware Updates, Like the BIOS in your PC<
HTC M8 does not get Cyan, it only will ever have the WP8.1 Updates to the OS only
Unless HTC releases a Firmware update of their Own.
We can have WP8.1 OS through DP, but there are things that are missing that are part of the Firmware that
will make the Lumia's run better with WP8.1, as well as improve much of the hardware (such as Camera improvements)
and Add Features like Miracast and Motion Data and a whole slew of other things.
Lumia Cyan and what it brings to Windows Phone 8.1 and the Lumia 930 | Windows Phone Central
the Icon smokes the M8 in every way possible. It's not even a contest.
Why the Top of the line Device on VZW Network is being side lined like it is, is beyond me.
The ICON IS the Best Device of it's kind Verizon has on their Network.
Everyone needs to start hammering the VZW Forums and calling them about the Cyan Update
It's the only way to get them to listen.
https://community.verizonwireless.com/community/windows