Wow. I pretty much used to talk about and dream of this same concept coming to life (probably better than it would actually be made) for a long time! Probably not the biggest coincidence but still!

For me, though, I'd really, really like a "second-coming" (better polished, more fleshed and thought out) of SWG. Well, let me rephrase that: I'd love for a perfect Star Wars sandbox MMO, strictly canon or not (the ability to become a Sith or Jedi - something I'd like but I could live without if I had to).

If I wanted to set the bar higher? Let's merge our ideas! Maybe a good Star Wars sandbox with action, freedom, and attention-to-detail features that are reminiscent of GTA but instead of being confined to singleplayer or under 50 players, an MMO! Since this is purely a dream game, how about we include all of the planets in Star Wars lore with immense attention to detail and scale and servers that can handle all the players playing on the same "hive". To go further, I'd say let's throw in lots of ships and speeders (all customizable to a great extent, more than GTA:V's LSC, Eve, Star Citizen, any racing game or other game ever made but all realistically acceptable in Star Wars lore/canon) and have atmospheric flight and space travel, space dogfighting and exploration, and all between docking on the next planet you want to explore in fine detail!

I could go even crazier than that. Maybe rural planets could have a mix of SWG's (and other sandbox MMO's) and Rust/Ark/Epoch style base/house building (to a believable and realistic extent), creature taming/handling, etc.

I could really go on forever but I'd basically just start describing a Star Wars simulator that would require something close to the technology of The Matrix to be a possibility.