Not in the near future.
Wasted 50+ hours trying to use multiple exploits to get my Z rooted. The ROM is the same as the Tablet S, but still, can't get it to work.
Also contacted DoomLord (a famous XDA dev.), even he failed to come up with a solution. ICS on either of the Walkman doesn't seem to have a root method.
Conclusion: Keep dreaming... :P