New upcoming Macro commands?

I just read about some new macro commands that will be available in {an upcoming} patch. Here's the skinny:

Macro Commands
* NEW - /petautocasttoggle
* NEW - /targetlastenemy, /targetlastfriend
* NEW - /targetexact
* UPDATED - /cancelform will be recognized instantly (as /dismount is currently)

There is speculation that the thing with /cancelform will allow druids to shift directly from one form to another without visibly appearing in caster form at all, or to begin casting caster spells directly from feral form(i.e. instantly shift out when you start casting a spell like Healing Touch) I imagine a natures swiftness/healing touch macro will now be totally instant from feral form to healed. ouch to pvp opponents!