I have seen the new iPad Pros, and they are about what you'd expect, not that that's a bad thing. Since the "hands on" process is basically the same as handling any other iPad, let's focus on answering questions.
The new 12.9-inch iPad Pro is the easiest to describe, since its physical design is the same as the original model. It's still a 0.27-inch (6.9mm) thick, 1.49 pound (677g) tablet that looks like a stretched-out version of the iPad design Apple has been selling since 2013 or so. The difference is that some of the features introduced in last year's 9.7-inch iPad Pro weren't ready for the first 12.9-inch version. That list of features includes: