My observations yesterday about the new Mac App Store reminded me of a concept that I've been bandying around for a few years now of the Personal Computing Allowance.
In the way in which many organisations pay a car allowance to eligible staff from which the staff can choose how to provide for their transport arrangements, in this increasingly commoditised and consumerised computing world, why not do the same for your staff's IT needs, shifting PCs off of the company balance sheets for ever?
We are in a world where most apps can be delivered through the browser. As a case in point, I left my laptop at home on Monday in the flurry of returning to work, and so spent the entire day working on (shudder) a Mac connected to only the Internet, and the only thing I couldn't do was print off my expenses form. In that world, and where some are constantly asking for the latest and greatest, why not just give your employees the money to make their own decisions about computing (and its associated support cost)?
Well for us at the moment the answer is ironically steered by software used on the most consumerised of all our devices, the Macs. The cost of the software installed on the Apples is so great (and the opportunities for cloud replacement of creative tools still so far off) that it just isn't viable to look at such revolutionary hardware ownership models quite yet.
mmitII 
Great post Matt. I think it's a very good idea. Consumerization is climbing the ladder to bigger ticket items. First came phones, now it's the PC's turn. I think we're going to see more and more Macs for the same reason the iPhone has become such a presence in corporate IT.
@JoeTierney