I'm not an Apple fanboi but do own a 2011 Macbook Air (2gb). The only real reason I still have a Desktop PC at home for web and video is because 802.11n cannot stream 1080p (at least not consistently in VLC over SMB). I do not want to buy an overpriced Apple Display for Gigabit Ethernet connectivity. So I'm stuck. I have an Ultrabook (docked to a 24" monitor) I'd like to solely use that's fast enough but it doesn't support the bandwidth I need.
Once the new Macbook Pro's are out I'll finally be able to upgrade to one of them and pair it with a new Airport Extreme (if 802.11ac can do 1080p in my apartment).
Sadly, I think at that point I will probably be masked as a fanboi even though I was really only looking for a powerful Ultrabook platform. None of which was previously possible unless I missed the marketing brochure from a boutique hardware provider (Sony) where they also started shipping 802.11ac.