Wi-Fi changed rooms by filling them with invisible radio signals. Li-Fi proposes another layer of connectivity, using rapid changes in visible or infrared light to transmit data at speeds too fast for the eye to notice.
Because light stays inside physical spaces, Li-Fi can help where radio congestion or security matters. Hospitals, aircraft cabins, classrooms, and dense offices could gain dedicated pockets of bandwidth without adding pressure to crowded spectrum.
It is unlikely to replace Wi-Fi everywhere. The stronger future is hybrid: radio for mobility and broad coverage, light for precise, high-capacity connections. Your next access point may be the lamp already above your desk.