The demise of the tank as a modern weapon has been predicted before, but it hasn't happened yet. However, anti-tank missiles have proven deadly, on occasions when opposing commanders have failed to anticipate and guard against their use. The effective use of fast-moving BRDM and GAZ truck-mounted Sagger missiles by the Arab armies against Israel is well documented. Another such case was the otherwise well-planned North Vietnamese 1975 Ho Chi Minh Campaign, when PAVN generals made good use of Shilka air defense vehicles to repel VNAF air attacks, but often neglected to provide their tanks with infantry support. Many of their T-54/T-55s fell victim to mobile and stealthy ARVN anti-tank teams, especially in the cities.
You'd think the PAVN's Soviet advisors would have taught them to always screen an armor advance with infantry, since the Red Army's own failure to do so had cost them so dearly during the Battle of Berlin just thirty years before.