Well, it's a bit hard to use on your lap. . . not to mention the batteries to power them things are huge! ;^)
Its on my lap all the time. I dont know why you say that. It powers with the regular cube batteries, and I keep them all over the house because they charge everyones phones super fast. Im sure there are applications like gaming and analysis I couldnt do but I dont need them. Youd have to pry my iPad Pro out of my cold dead hands.
The first couple weeks I found it too big and heavy but Ive adjusted and reg iPads seem like phones to me now.