>>not only ignoring market share, the assumption of positive near zero growth (less than 1% / year) via added Ultrabooks IMO is the least founded one: for one thing, current rise estimates there come from minuscle numbers, so growth should slow down there as numbers grow plus such numbers are notoriously unreliable, and - for me more telling - Apple showed a 7.5% decline in Intel machines as well, and they have had their version of Ultrabook already in place - MacAir was nothing new in 2012, as even 11' MacAir had been modified mid 2011 for the first time.
Agreed- though I was surprised to discover that the latest MacAir and even the bigger MacBook no longer has a RJ45. Wireless only with an option for 3G. It's morphing towards a big mobile device rather than a PC variant, which presumably is why Gartner didn't lump it in with PCs.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1