They are certainly highly ornamental and the wood is useful.
Fun fact: "sycamore" can refer to at least three unrelated trees:
-the sycamore fig or fig-mulberry (Ficus sycomorus): a fig native to the Levant, Arabia, and Africa. This is the "sycamore" of the Bible.
-the "sycamore" of the British Isles: a maple (Acer pseudoplatanus) native to continental Europe and introduced to England in the Tudor era. Believed to have taken its common name (in Italian and French, as well as in English) from the similarity of its leaves to those of the true sycamore, but its Latin name comes from an even nearer resemblance (at least in the opinion of Linnaeus) to those of the planes.
-the American sycamore which you posted (Ptatanus occidentalis), a plane native to the eastern U.S.A. and the Ontario Peninsula in Canada. Probably got its common name from the aforementioned similarity of its leaves to those of the sycamore maple.
-the Oriental plane (historically, simply "the plane"; Platanus orientalis), native to the Near East and the Balkans, which is sometimes called the "Old World sycamore" in America by analogy with the native species.>>1506143
The planes are generally considered "living fossils." Also, most of its nearest (extant) relatives are endemic to the Southern Hemisphere (mostly sub-Saharan Africa and Australia), while the genus Platanus itself is restricted to the Northern. They are actually more closely related to the water-lotuses than most other trees of the north temperate zone.