Create a painting of a futuristic, floating city where transportation is done through colorful, whimsical hot air balloons drifting through the sky.

A visually captivating representation of a floating city set in the far future. The city appears to be hovering amidst cumulus clouds, with towering iridescent skyscrapers that gleam under the sunlight. Innovative architectural design is featured, hinting at advanced technology. The default means of transportation is through vibrant, whimsical hot air balloons. These balloons, speckling the sky in a myriad of colors, drift peacefully among the skyscrapers. The overall ambiance of the city radiates a sense of tranquility and futurism.