If you set your streaming video to 360p or 480p then that post was not aimed at you, it was aimed at people who stream in HD. Not everyone is as "kind" as you.

For those with 4G devices streaming in HD, the quality would simply be lowered DURING any throttling period and then restored to HD afterwards.

As has been mentioned MANY times before, this is nowhere as draconian as the throttling currently taking place on 3G devices whose throttling continues until the end of the billing cycle. The new measures have been described as ending as soon as the congestion ends.