Before launching theire latest game NLT Media said that The Genesis Order would have a "new game engine" which turned out basically to be the RPG Maker's old "game engine" with a few plug-ins and frills added like day, evening and night shading and backgrounds and variable "weather" which has rarely made an appearance. In fact I don't think there's been any rain, let alone a storm, in North Santiva since the very first episode of the game as far as I can remember. If this particular studio are going to pursue better screen resolutions at some point in the future they will have to take longer, or get more and better equipment to do the rendering necessary, or both most likely. I'm not sure that when NLT Media speak about a "new game engine" and whatnot that necessarily means moving to a better and more versatile developmental platform like Unity for example.
Higher resolution graphics is always an improvement however.