Amtrak's passenger locomotives do look more streamlined than their boxy-looking, utilitarian freight locomotive counterparts.
However, the U.S. has always been eons behind other nations in passenger train advancements.
This is a photo I clicked back in August, 1973, of one of Japan's Shinkansen trains just before boarding. Even 46 years ago it reached speeds of 130 mph between Tokyo and Kyoto. Today they're even faster at 200 mph.
France's current TGVs are even more futuristic looking, with a super aerodynamic design that reduces head-end drag enabling speeds at 200 mph and up. Testing has put it at 327 mph, in one instance.
China and other countries are also either currently using or working on similar train designs.
I guess my point in all this is emphasizing that it's too bad the U.S. is so far behind in passenger train development. Other than the Acela in the Northeast, Amtrak has no dedicated high-speed passenger lines and is at the mercy of the freight railroads, which give their trains priority over Amtrak trains.
Amtrak's regional passenger train service including the Cascades in the Northwest, the Pacific Surfliners in southern California, and of course the Acelas in the Northeast, aren't bad, considering. But overland east-west train travel on Amtrak leaves much to be desired.
Our country is too large to accommodate east-west transcontinental high-speed rail service and Amtrak's current long-distance east west trains have a questionable future. But it would be nice to see more development of dedicated rail lines for high-speed passenger train service in other regions of the country in addition to the Acela in the Northeast.