What this ruling applies to is non EU foreign nationals that have a residence card based on marriage to an EU national, whether they a British or not.
In France they call this a "carte de sejour" and gIves permission to live and work in France and travel freely throughout the EC for visits. Except the UK.
I hear on other forums that you need to be resident for 90 days, I do not know if it is true or not, however my wife travelled to the UK on a family permit (based on our residence in France) within this timeframe back in 2009. It was approximately 60 days, but the application was made after 15 days of receiving the residence card.
From my perspective this ruling is great as even though the Family Permit is free it still costs 500€ each time to travel to Paris, hotel, visits, meals, beer, wine..... As well as an application form and all of the usual supporting documents.
This ruling is of course still not bring followed by the UK, it just goes back to the jig courts now for consideration and judgement.
Mike