Roku  is getting the PBS app ,it would be nice  for the WDTV Live  Hub

Roku is an “app” player; the WD basically is not – it has a different focus.  Have both players and have best of both platforms.  BTW, I probably will not sign up for the PBS Roku app – they want my frikkin’ email address to use the app.  No thanks – I don’t need to be on another junk email list!  (This could be a good reason to create another email address - that’s essentially a “black hole” at Comcast –  specifically for the junk email spammers of the world.)  Anyway, there are other ways to see the PBS stuff.

You want all that stuff on a WD player you need the PlayOn media server.