Originally Posted by
GerryinHouston
But I am also describing another problem, namely, that bike computer maps are 'lower resolution' as far as information goes.
No, the map data isn't "lower resolution". Most maps are vector based (which makes them resolution independent).
Phones typically have better screens to see detail.
Originally Posted by
GerryinHouston
Overall, if you want to spend the money on bike computer and sensors, you can end up with a system which may be more capable than a smartphone. For my purposes, I don't want (or need) to spend the money.
There isn't any reason a smartphone couldn't work well.
You also don't need to spend "$350-500" for a GPS unit (a $150 used/refurbished 800 works as well for navigation).