It must have occurred to others too that any particular configuration of clouds that one notices in the sky has never existed before and that the configuration will quickly change, especially on a windy day, and will never exist again1.
So what profound philosophical implications might this revelation have? I haven't the slightest idea.
1. The total number of possible distinct configurations of clouds there can be would be an enormous number if it could be meaningfully calculated. Consequently, assuming that cloud patterns develop more or less randomly, the probability of any one of them forming twice during the lifespan of our universe must be nil for all practical purposes.