The term "filhorse" is not an established word. The most informative response requires assuming a misspelling. If the intended reference is:
As with any internet trend, the longevity of filhorse remains uncertain. However, its impact on online communities and cultural exchange is undeniable. Whether filhorse will continue to evolve and grow or fade into obscurity remains to be seen. One thing is certain, though – the phenomenon has brought people together, sparking conversations and inspiring creativity.