I think this episode was pretty cool (better then 403 & 404).
Here is my point of view:
At the end of 4x05 Hank said "Since when do vegan eat fried chicken" and looked at the Pollos wrap. In this episode the Pollos truck was hijacked and left with 3 dead people. Now the DEA will probably find the Pollos truck with the meth.
So the DEA & other drug cartels are closing up on Gus, Hank is closing up on Walt and Skyler wants to leave Walt. My guess is if the DEA is not taking Gus down, the other drug cartel will and maybe kidnap Walt and Jesse to another state, Hank finally knows and Skyler is taking refuge in new mexico with the kids.
Or what do you think?
Inside Breaking Bad 406: Cornered