I'm sure I'm not alone when I say that I never imagined in my wildest dreams that I would ever in my lifetime, purchase such an expensive vehicle. Do I plan on keeping it for 10+ years? I plan on being buried in it.
As far as keeping the interior looking good as long as possible. The sun is your worst enemy. Keep your X garaged. Whenever you go out, make sure all windows are tinted well and you put a full coverage, solid sunshade up whenever it is parked outside. Buy a car cover. If you plan on driving your X to work and keeping it in a parking lot for 8 hours, then use the car cover. Not only does it protect the interior, but it protects the paint, and helps to deter thieves. Leather needs natural oils replenished. Apply Lexol (or a comparable product) to your leather twice a year, or depending on your vehicle usage, more often than that. Apply tempered glass protectors over the two screens. This will eliminate possible scratches, and provide protection from an accidental impact to the screens. Keep your vehicle vacuumed to eliminate dust from floating around and collecting in the headliner (which can make it look very dingy).
If you do those things, you stand a very good chance of having your vehicle look like new for several years before it even starts to show any wear whatsoever. I'm sure you could have this done weekly by a professional, though I wouldn't want to know how much that would cost. I've always done it myself, and whenever I've sold my vehicles, every buyer has always commented that the interior looks, and smells like it was never sat in; so that has never been as important to me as it is now with my X.