It's amazing how cumbersome it is to place your finger on the Touch ID sensor on an iPad when you are used to FaceID on an iPhone. The new iPad Pros are almost worth it alone for the Face ID.
I agree... I really look forward to FaceID on the iPad. I have a 9.7 inch iPad Pro that is the device I take to meetings and out in the field. When I need to use the iPad it is either in my lap or I'm staring right at it while it is on the table, so I don't think FaceID will be a problem. When my iPad is on a conference table it is propped up at an angle so I can see and use it more easily. I never use it in that context with it lying flat on the table. If it's flat on the table the cover is also closed.
I haven't encountered the table issue with my iPhone X much either, because my iPhone is always in a pocket or bag. It's rarely just sitting on my desk or table. If I do have it on my desk it is usually sitting in a stand and FaceID works fine. In fact it's kind of nice to see a notification come, look at the phone, and it just shows me the notification without me having to touch the phone. I can keep my hands on my desktop computer keyboard.
I suppose part of my behavior is related to the fact that I also wear an Apple Watch, which means I don't rely on my iPhone as a source of information I view at a glance. I use my watch for that. If I didn't wear the Apple Watch, I could see it being more important for me to keep the iPhone on the desk or table in front of me so I could glance at notifications and other information. I remember doing that in the years before I had the watch.