WP2 will boot from Android/WeOS using the "box" image or if you overwrite WeOS, using the WP2 board image. All has been written in the wiki docs. Kodi will output the GUI at 1080p max (hard silicon limit) but video can be ouput at 4K with caveats: upstream code for S905 only supports 4K with 8-bit HEVC; because S905 doesn't support 10-bit, 4K H264 was never implemented in upstream drivers, and there is currently no HDR>SDR conversion. I would position any S905 device as 1080p max; you might find some content works at 4K, but most 4K media these days is HEVC/10-bit/HDR so it won't output or look right.
Thanks chewitt. I tried loading LE11 but finally settled on dtech's v9.2.8. One good thing with the WT Play2 is that it automatically enables dual boot and this allows me to use 2 OS unlike other boxes I have. If I can only run a Linux distro on the Play2, that would be the most I can ask from this box.