There is a lot of features that is not covered in Google Maps, like notifications - speed traps, traffic, etc.
I have a TomTom Go1000 which I purchased early last year, primarily for the so called Live HD traffic updates, I have had numerous problems with my Go1000, but the most disappointing problem was that the TomTom/ZA lackey responsible for entering and broadcasting the traffic updates was still fast asleep at the time I am normally on the N1(N) in the mornings, afternoon notifications were somewhat better.
TomTom's marketing surrounding the Live HD traffic updates made it sound like it was a completely automated system that received 'telemetry' info from vehicle tracking companies and other TomTom devices (GPRS) to determine where traffic had snarled up followed by broadcasting of notifications, I soon discovered that was not true at all and seems to involve a lazy incompetent person somewhere in the TomTom Live HD traffic loop.
The TomTom Android app does sound good, but based on my experience with the Go1000 as well as TomTom's money making firmware+maps update schemes, I will not fork out even a small amount of money to try TomTom's Android app.
Then there is just the small matter of TomTom's iOS6 app that has been widely reported to be a disaster of epic proportions, which leaves me with the impression that TomTom's app dev skills are just as bad as their firmware dev skills for the Go1000.
As for "TomTom does the Robot" it looks more like a bunch of wannabe zombie extras from a very low budget TV film.
Each to their own.