HTC M8 may be formally announced in late March at New York City event
Aside from recent and steady trickle of information about the device, we are not 100% certain about anything related to this device. What the rumors have been spreading though indicate some incremental hardware advances, which may not inspire many people. That said, we cannot rule out that HTC has some cool things at the ready for the device we are currently referring to as the M8 (or One 2, or One+).
Assuming that HTC takes a semi-incremental approach to some of the hardware, the HTC M8 may prove its worth with a knock-out user experience and continued premium build quality that we loved seeing on the HTC One. As of now, it looks like more will be revealed in March according to the reliable source that is, @evleaks.
Things that are NOT allowed: