I wonder how temperatures are going to be on that thing with no heat-sink?
or are they not showing it yet? because it might be massive and cover the whole board?
Indeed another flawed implementation from Khadas. It will overheat without a heatsink/fan which you will have to bodge together yourself (at least initially). To answer your second question - thats what they did with the VIM2 and it most definitely needed a heatsink and fan.
The direct competition, the Odroid N2, has a heatsink, a cheap yet decent case and is undoubtedly cheaper to boot.