[tomsem]

One of the gaping holes in Apple's narrative about 'productivity' when it comes to the iPad Pro (and iOS generally) is the lack of app support for physical keyboards, and in particular the ability to navigate with one and use hotkeys. OS X, Windows, and even Android apps tend to have decent support for this. But in iOS even reading apps tend not to respond to keyboard Page Up/Down or Right/Left arrow to turn pages.

There are a number of apps that have keyboard support, and with the ones that don't, I've been sending feedback to the app developer.

Ideally, holding the Command ('cloverleaf') key brings up a menu of available hotkeys (defined as keys that do something when Command is pressed). On Home screen, there are only three: 'Go to Home Screen' (ironic, since by definition you are already there), Search, and Switch App. These do roughly the same thing as they do on OS X, only less (Search still forces you to tap the screen to select what you have found, Switch App shows only a handful of the apps in the Recent list). But, okay, it's a start.

Productivity apps like Evernote and Word also have hotkey support.

But reading apps? Sigh. Can't even turn pages for the most part (with some exceptions).

Yes. There are accessibility features that can be turned on to enable keyboard navigation, but I would not call it efficient (it basically allows you to visit UI elements linearly, but not in two dimensions, or using tab to jump to next group), and even there you are dependent on the app developer to implement that in a reasonable way.