I still doubt that this Tyrell is real.
Too many things don't make sense, like why is he in a suit and look so calm when he's internationally wanted (remember he was a nervous wreck at the end of season 1)? Why does the Dark Army/Robot even have use for him when he doesn't work at e-corp anymore and was a laughingstock on his way out? Also the cabbie didn't look in his direction at any point when he entered the cab, plus he's Bin Laden status, everybody would recognize him.
I'm leaning towards some next level hallucination but we'll see.