Caught by the spirit of the times (from the German term Zeitgeist). The typical experience of being zeitgeisted is the realization or epiphany that some personal characteristic, predilection, or experience believed to be special to you is in fact common out there in the Zeitgeist. You believed it to be uniquely yours, but in fact you were probably interested in it for the same reasons that dozens or thousands of others are as well. Your pursuit of originality was futile! Now you have just been reminded of that fact.
“A week after he launched his new website on (some obscure subject), G. was zeitgeisted by Wired Magazine publishing a feature on the exact same subject.”