Jason Snell tested a pre-production unit of the Brydge keyboard for the 2018 iPad Pro (in the 12.9" flavor) and it sounds like this will be the iPad keyboard worth waiting for:
To attach the iPad to the Brydge 12.9 Pro, you slide it into two hinged clips covered with rubber padding. As with previous models, it takes a little practice to get the feel right. My main concern once the new iPad Pro was unveiled was if Brydge would be able to design a clip small enough to only cover the iPad’s much smaller bezels that also held the iPad securely. I’m happy to report that the answer is yes—there’s enough room and once the iPad is attached, the connection feels solid.
The clips are the same size front and back, meaning you can remove the iPad, flip it around, and insert it back into the clips to use the Brydge as a “movie mode” stand, or even fold it down and use it as a double-thick, double-weight tablet. (I don’t really see the appeal, but Brydge says that some customers requested it.)
In a nice touch, the Brydge 12.9 Pro comes with a slight indentation at the bottom of the wrist-rest space (below where a trackpad would be, if it had a trackpad). This creates a natural lifting point to open the “laptop”, which was sometimes tricky on the previous models.
Once I was able to get my hands on a functioning unit of the original Brydge keyboard, I fell in love with the idea of turning the iPad into a "convertible" computer that could work both as a laptop and a tablet. I later upgraded to the second-generation Brydge keyboard and used it until I upgraded to the latest iPad Pro in November. Products like the Brydge keyboard tie into the iPad's hybrid nature – the multiplicity of input systems and work contexts that make it, as Jason also notes, more flexible than a traditional laptop or desktop computer. I was concerned that the smaller bezels of the 2018 iPad Pro were going to be an issue for a redesigned Brydge keyboard, but it seems like the company has not only worked around the iPad's new design constraints, but even improved upon previous generations of the keyboard case. I'm going to pre-order one as soon as possible.