Yes, but then I would have to remember alphabetic keymapping for all keys on the calculator. The HP49 has enough keys for a full alphabetic keyboard, but the alpha bindings are secondary. If I were going to memorize them, I'd probably just use my BT keyboard.
However, I just looked it up, and the version I remembered was for 320x320.
There's also a version for 320x480, which should be less cramped. Stylus-only, but should be usable.