PAUSE LIVE TV ???

I've been evaluating and comparing all TV services against one another (satellite, cable, and streaming).  While I'm almost there with Xfinity (for various reasons) there's one big problem.  On the X1 box I can PAUSE Live TV.  When watching TV on my other sets using Xfinity Stream, I CANNOT PAUSE LIVE TV.  That's huge for me.  Is it a setting I'm missing or what?  So far, most all streaming TV services can pause live TV. 

???