Original Grand Theft Auto was among first games I've played on PC and I have very fond memories of it (along with Jedi Knight, Age of Empires, Quake II, Duke Nukem 3D, MDK, Diablo, Daggerfall).
Claiming that it copied Urban Chaos, because it too has an urban setting with cars and pedestrians is more than a bit far-fetched.
As I said, it is the only game I remember that had resemblance to GTAIII that came out before GTA did. There were no games like that, most 3D games in late 90s had fantasy and Sci-fi setting. I've played first and second GTA but couldn't imagine how GTAIII would look like before I saw it with my own eyes. Only somewhat similar game was Urban Chaos. 2D GTA and 3D GTA have so many differencies, basic gameplay is the same but there are no small details in 2D version that we all loved in GTAIII and in newer games.
Another "revolutionary" video game was Codename Eagle. Believe it or not, it was the first 3D shooter where you could control vehicles in somewhat realistic manner which wasn't fantasy or sci-fi game. Later, the studio that made that game became part of Electronic Arts today known as DICE.
Driver is more like Midtown Madness type of game. You drive a car around and perform missions.