The most likely deliver system in Europe will be a satellite phone - Iridium most likely.
I wonder how they worked out
cost for a typical user at between £15 and £30 a month
The reason I mentioned Meteox is because the Avidyne weather radar maps in their sales blurb showed the same coverage limits (basically, nothing south of the Alps) as meteox.com has.
However the place which Meteox gets it from will also sell it to anybody else, and I guess WSI is one of these. Meteox is just time-delayed and funded by adverts.
I doubt this stuff is as good as weather radar, unless the data is absolutely real time. AIUI radar gets used for tactical TS avoidance.
One could fit a satellite phone based system to any plane which has a suitable MFD. I think the vast majority of European GA doesn't have one of these, and the Q is how many will put in a big piece of glass.