Sure - and I'm impressed they added in that detail - but I reckon still 'flat' in terms of the orbits. You'll see all the planets in the system along the orbital plane, regardless of your position or theirs. You'll never have to wait for something to come out from behind the sun, or a gas giant etc.
Actually I also came away from the livestream with the district impression that its a real view from your ship's location. I can't say that they ever stated that explicitly, but a) the view in the FSS screen very closely matched the cockpit view before they activated it, and b) the movement felt pretty similar to the 360° turret interface that multicrew gunners get. At any rate, easy to test once the beta lands, but it would be quite nice if one of the community folks could drop by and answer the question: "Is the FSS view rendered from your actual ship location, and if so, how does it handle objects obscured by the star?"
To the OP's concern, I'd love to have a config menu option for this. "Throttle down when activating full screen views Y/N?" Default to yes for newbie-friendliness, but that way experienced players can choose the behavior they prefer. As it is, I'm sure there's plenty of pilots (myself included) who've gotten into trouble because they forgot to throttle down or stayed in map view too long.