As noted earlier, Taker got very emotional as he went to the ring/stage to accept his ring. Before he spoke, he hugged Vince McMahon and he got a very long standing ovation that lasted several minutes.
After thanking the fans, wrestlers, and his family, he donned his attire and fans chanted for one more match. Before leaving the ring, Taker said "never say never" to a huge pop.
So apparently, the door is open for him to wrestle at least one more time.