Yes. For me, it's a good size as a lap-pad. I think I could be better on an iPad if I had free use of both hands with the iPad sitting on my lap. (One of my main uses for it will be in weekly auditorium settings for research, study, and note taking.) It's big enough that I will be able to see the content without holding it up or slouching over it, and I won't have to lock my knees together to rest it on my lap without fear of it slipping through my legs, as I have to do when using an Air.
I'll get the Pencil (for illustration) but not the Smart Keyboard. I'm really intrigued by Logitech's CREATE keyboard, designed for the Pro. The product page says they worked with Apple to make it, it takes advantage of the Smart Connector for instant connection, and it never needs pairing or charging. And then it says: "Shhh. We can’t say more right now. But we can say CREATE will make more possible with your iPad Pro. From day one."
I hate reading too much into things but that, along with the tongue-in-cheek secrecy, sounds as if the CREATE will add functionality--above and beyond a keyboard--that the Pro doesn't have. I will wait and see.