I may have misinterpreted what was said at the seminar, but these are some of the points which I felt were specifically different and worth mentioning.
Basic Service: Officially you won't receive any specific traffic information unless the ATCO deems that you on a direct collision course and a DEFINATE risk of collision exists, he 'MAY' then advise you of that.
The ATCO may ask you to maintain a heading, altitude etc, if you agree then you are LEGALLY BOUND to that and must not change without informing the ATCO.
Traffic Service: This more closely resembles what I have come to expect from a FIS. It will only provide information that will pass within 3nm and 3000ft, but you will make an agreement on your heading/altitude etc and you must maintain that as you will be LEGALLY bound.
Deconfliction Service: Now available to VFR pilots, however this could mean that you can be vectored anywhere the ATC decides to maintain seperation. The other thing is that the ATCO does not have to inform you about traffic which he has 'coordinated' which may pass as close as 500ft underneath/over you (i.e a hercules). Also you should not take a deconfliction service when you don't need it is as you may have taken too much of that ATCO's attention needlessly affecting the service for other aircraft, which if proven could be illegal.
This is only my interpretation of what was said, which stood out amongst the other changes.
There is a topic on the ATC section, which is probably much more detailed and correct.