That's not how the scenery normally looks like. The taxiways are fine, but the photo background it's not. Does it happen if you lock the fps at a lower frame rate, like 30, for example ?
Locking at 40 doesn't make much sense anyway, 30 would be a far better choice, combined with VSync, because it divides nicely with the standard 60 hz refresh rate of most monitors.
Also, verify that you have the global texture size slider to "Massive" and the "MipMap quality" slider set to at least 5, but you might try increasing it up to 8