With a rather high price tag of $599.00, I'm not sure I'll be purchasing one any time soon, but maybe some of you might. If you do, please let us know! It was a lot of fun to play with, and I definitely see the utility of it.
Here's the list of features copied from their site:
Graph functions and trace points made accessible with speech and audible tone.
Listen to entire graph, including special sounds for negative regions and axis crossing points.
Scroll the history of calculations and quickly recall and edit input/output.
Choose how to view calculations on screen: as decimals or fractions.
Matrix functions and calculations.
Amazing list of scientific, statistical, and financial functions.
Superb synthesized speech (FonixTalk (TM) from SpeechFX (TM)) with choice of voices, speech rates, and pitch.
Listen using stereo earphones or built-in stereo speakers.
Full key help mode, which describes all keys, including 2nd and Alpha functions, without losing your work position.
Temporary mute mode for teacher/student interaction.
Use the screen reader to review the screen without losing your place.
Full access to all menus, expressions, text, and symbols displayed on the screen.
Expandable hardware accessories using USB port.
Connect to your computer via USB cable to print or emboss graphs and other work (requires a printer or embosser and a PC).
LCD display and keypad functionality are identical to the standard TI-84 Plus.
Just for old time's sake, here's a picture of Ken Perry of APH holding the Orion: