Thanks guys.. You are both sort of reinforcing what I already new.
My existing wireless router broadcasts both the a/g/n, and wired connections will always be faster.
And I figured laptops would likely need new wireless cards.
But i'm curious about tablets, phones, appleTV, roku and those devices that all have built in wireless. How can determine what they use now, and if their internal cards, etc will support wireless AC?
do any phones or tablets supports wireless AC?