Of course it will affect them - they will have to ensure their drivers are fit to drive at all times. Drivers will not be able to work extended periods of times and Uber may be forced through this to pay for holidays + sick leave.
Not that Uber can be trusted, but they claim they're already in compliance with pertinent laws. In other words the effects have already occurred. It seems like this case was an attempt to reverse that condition and they lost.
Yes this is a very good point. I asked an Uber driver in London if they put any restrictions on driving time and he confirmed that they did not. Might have to rethink that one.
In Helsinki Uber drivers ask you to sit in the front because they don't want to get stopped for operating an illegal taxi.