I wonder if Zwift can improve the graphics in the game. Out there, you find awesome realistic graphics and Zwift would really benefit of it. As long as you have an option to change the level of details (how is right now), there should be no issue for those running it in their phone/tablet or slower computers.
There is two types of graphics: stylized and realistic. Second one gets outdated quite fast because of technology progress. And first one always look good. Obviously Zwift uses second one, in some old interviews you can find word “cartoon”.
Good example of that are games like Okami, Zelda, etc.