I am sorry if I am gaining a reputation for asking vague questions.
TomTom is trying to persuade me to buy a new satnav. Leaving aside the questions of whether a smartphone would be better, and the real time data, would a new device offer me a better experience? I assume it would be much faster in its calculations. However, would it show more sophistication in calculating routes and providing guidance, or would it essentially be the same algorithms and same outcomes?