He says the racks wont bend.
According to the owner:
"The limitation factor in our racks isn't the rack itself... but the roof of the vehicle. You can't bend or damage our racks. It would be the roof of the Toyota itself that would be your limiting factor. Have a party on it if you dare..."
I gotta admit, I like his attitude.
So what is the weight limit of the roof? There's your limit.
Still not sure whether it will be basket-like or not... Worst case you would have to stand on the bars or add your own mesh or board.
As far as those roof top tents go... to each their own.
I'd rather just sleep in the truck. The maggiolina does look pretty nice, actually, but notice they all have rear tire/accessory mounts. Now if one of those were available...
Personally, their 4th Gen rack is perfect for me. Takes care of a number of off-road essentials, freeing up the cargo area from sharp, hard objects (hi-lift, shovel, axe) and keeping the spare off the trail. Not to mention keeping dirty tools out of the interior.
The Gobi does look nice... I don't expect one for a while if ever, though. Too bad, because I don't think it would be hard to design one. If only I had my own machine shop and access to the Toyota 4R CAD files...