These are interesting times for our home IT strategy. Recent Apple changes are accelerating the demise of the general purpose computer in ways I'm only beginning to understand.
At our home, for example, we have been using MobileMe to manage Contact synchronization between iOS devices (iPhones w and w/o SIMs) and our four Macs. Each of the Macs has multiple user accounts to serve some subset of our family of five. (I'm omitting the Google Apps aspects to simplify - things are complex enough).
This has to change, MobileMe is going away June 30th 2012. It is being replaced by iCloud. iCloud works with most of our iOS devices, but it requires Lion (Mountain Lion soon) on the Macs.
Of our four Macs, only two will definitely run Mountain Lion. .
Meanwhile, Google's Anakin Skywalker emulation means we want to back away from our dependency on them, which leaves, unfortunately, even more dependency on the Other Devil.
I think, going forward, the transition over the next year is to:
- A server (iMac) and 1-2 laptops
- iPads - eventually one for each child ($$)
- iCloud (yech)
I'm glum, but I don't see how I fight this. The old G5 iMac with the decaying (delaminating?) display may go to anyone interested in a machine that can run MacOS Classic. The Dual USB laptop will stay Snow Leopard and be a kid's homework machine.
 Lion is such a mess I've been restricting it to a single device that came with it. It's unlikely that Mountain Lion will work on our Core 2 Duo plastic body MacBook with integrated Intel graphics, though there are rumors that Apple may add some coverage. It appears even Apple is embarrassed by Lion, and may feel the need to bury it rather than let it quickly.
Update 2/25/12: ironically, one reaction to Apple's Snow Leopard/MobileMe/MacBook triple termination is to turn to the other agent of the DarkSeid - Google. i used Spanning Sync ($25/year) with some success for several years to sync Address Book to Google. We already use Google Apps Calendar for our family including our iPhone calendars. So one solution is to go Google across all our Macs, even on Mountain Lion.