Of the few EVO 3D threads, there's yet to be one addressing the fact that this is indeed the successor to the EVO 4G. Though the 3D feature may or may not be gimmicky, the device is a full-fledged successor and [according to Engadget / Phone Arena] will be (one of) the best-spec'd phone of 2011 (as the EVO 4G was last year).
-qHD Display @ 960x540 - MAJOR upgrade from E4G
-1.2GHz Dual-Core SoC + 1GB RAM (Qualcomm's MSM8660
) - MAJOR upgrade from E4G, besting Tegra 2 / Tegra 3D
-1080P Video Capture/Playback - MAJOR upgrade from E4G
-Large hardware camera button - this is great great great!
-Ships with 2.3 Gingerbread - great great great!