Yes, you would in America. It's a question of simple geometry and perspective. I haven't ridden TGV, but I'm guessing you're talking about smaller things, probably man-made ones (e.g. buildings), maybe trees, relatively close to the train. You're not going to see anything like that when riding a train across Montana. Instead, you're going to see enormous wide-open natural spaces, with absolutely nothing really close to the train. So even at a speed 2-4x that of Amtrak's, you'll see it just fine.

All TGVs run at 300kph in the countryside, which is (on a smaller scale), just open spaces. The speed reduces your field of vision.