visionary

[1]	illusionist , dreamer , idealist , seer , romantic , fantast , wishful thinker , Don Quixote

adj.

[1]	dreamy , speculative , unpractical , impractical , fanciful , imaginary , unrealistic , unreal , romantic , idealistic , unworkable , Utopian
[2]	airy , impractical , Laputan , windy