How fast is the HP Prime?

[Chris Pem10]

I've got an old Pentium 90 and a Core i5 overclocked at 4.8 GHz. Regardless; I can still only type about 20 wpm on each... because the interface never changed. My results are 99% determined by how fast I can find and press the correct button.

Where the Prime fell short in my expectations was in the interface: it has a full-color touchscreen that is under-utilized. It's 2014: any physical keyboard on a handheld device is obsolete. I wanted the ability to not just make user-defined keys... I wanted user-defined on-screen keyboards. I wanted to press one key and launch "calculus keyboard mode" or another button for "unit conversion keyboard". Would have been cool if a teacher could "lock-in" a custom keyboard of functions they wanted to allow for a particular exam. And every time I swipe the screen to the left, I get a new calculator instance for "parallel calculations"... so if I'm stuck on exam problem #2 I can just swipe a new calculator instance and come back to problem #2 later without having to re-enter everything.

If someone would re-engineer the HP48 android emulator and, instead of using the stock HP48 keyboard layout, create a custom keybaord that dynamically covered the entire screen real estate of a 10" tablet, that would be worth paying for... even if it could "only" perform the same functions as a 25 year old calc.