I find this ridiculous, but you're probably right. I could run a complete offline maps application back on WinMo 7ish years ago. TomTom had the complete maps for the entire continent, text-to-speech synthesis, and directions being calculated all client-side on general-purpose phone hardware. There is no reason we should need a dedicated GPS device.

Then again, there probably already exists a similar app in the market for Android that provides all of this service offline, we're just ignoring it because it costs north of $50 or something.