The thread is about someone asking about GPS for his bike, and people suggesting and providing information on the options.
From what I understand from the distributor, and you'll also find it on the site, you can plan routes on it from point to point on the device. I believe that you can also upload routes to it, as with the Garmin. There are web sites which will plot road routes for you between two points and then convert them to a .tcx or .crs file. You can then transfer them to the device and get off on your bike.
I think you're talking about it planning road routes from only start and end points. It doesn't look like it does this.
As I said before, the Garmin Edge 205 is plenty enough for following routes on your bike without mapping on the screen, the only problem (it's never been one for me) really with being able to find your way back onto the line if you're daft enough to get lost. When cycling you're not really going fast enough to stray enough off-route for this to be an issue, but having the maps on the Satmap will get rid of the problem completely. If you can stomach the cost.
Trouble with all the 'GPS' systems, is that they are not very good with roads. I travel on roads, like most others. GPS systems don't care about roads. As a result, a lot more is involved with getting a GPS system to be a road navigation system, instead of having a TomTom type system, but smaller with much much longer battery life, plus weather proof.
A GPS system for me is a waste of money, and for everyone else that only travels by road. Perhaps there are exceptions for some sport cyclists, but for all others, a road navigation system is what is required, but built for cyclists.
Basically, the answer (for me) is not to MAKE something do the job, I want something that is designed for the job. I have no desire to pay for a system that I have to MAKE do the job.
The time when locations are by map address, and GPS systems NATURALLY follow roads for navigation and on-route mapping, plus allow you to change mid-route, then I will be interested in something that does more than a TomTom (with weather proofing and decent battery life).