Bulldozers of the Future

I've still got a lot to think through as far as how construction equipment might look in the future. My future is going to be pretty grounded in the past. Without having to state much history, I'm thinking that I'm going to have technology move two steps forward, three steps back, four steps forward, five steps back, etc, until I land at a place where technology is grounded in the past, present and future. I want things to be recognizable to kids without being too steampunk or flying car. Here's a bulldozer sketch.