Got the Pico 4 in today, so far so good. Display resolution is definitely a step up from the Index, although it probably loses a bit with the Virtual Desktop compression. Didn't notice too much though. It did feel slightly lower FOV, but probably higher than the Quest 2. Black levels seem better than the Index, colors seemed fine to me. Not completely sure what I'm going to do for battery or continuous calibration tracker mounting, but that's a issue for another day. On the default battery, it seems to be around a 1:45 battery life when used alongside Virtual Desktop, so you will definitely need an external. Not too different from other standalones I guess. It's definitely lighter than the Index, and better weight distribution than the Quest 2, but has less cushioning than the Index.