BskyB buying The Cloud isn't interesting because it positions them to compete with BT for on-the-move wifi access. It's interesting because it positions both companies to be currently the only players in the next mobile market.
What we quaintly call our mobile phones are increasingly obviously just sub-scale computers. On a train today I used mine as a 16 gig music player, a Twitter station, a Kindle and a text-messaging system. Next time I buy a phone it'll be the biggest tablet I can fit in my pocket - a reality Tmobile's data cap seems to obviously reflect. Or to put it another way, my need for mobile Internet access on my "phone" so vastly exceeds my need for voice telephony that the market BT, and now Sky, are getting into is the sort of universal Internet access both home and away that will form the basis of my next "mobile phone" contract.
So it's a smart move from Sky, but not one to compete with BT so much as to join BT in eliminating Vodafone, Tmobile, Orange and O2 over the next few years. Voice is increasingly a needles luxury on a mobile phone, especially when it's still used to lock you in to long contracts that can be avoided by going without.
(Photo from sklathill on Flickr)