There's also the issue that you may want certain devices to remain plugged in, even when your PC's off. For example, although I wouldn't miss my monitor or speakers turning off, I have a modem, router, and wireless printer plugged into the same power bar, as well as a laptop charger. I wouldn't want any of those devices to be plugged into controlled outlets, as it would degrade my home network.
The problem is that it is increasingly difficult to find power bars these days with multiple non-switched power outlets. Most such outlets I see have the controlling outlet, which is of limited value to me.
As far as phone chargers, I picked up a Antec UA4-25 4-port 2/2/1/1A (25W) total charger that works perfectly for charging up to 3 phones or iPads at a time (though it won't charge my PS3 controller). Don't need to worry about using an entire power bar just for USB chargers, or having separate chargers for my 2A iPad. My only beef is that it's limited to 25W, whereas using all 4 ports simultaneously would use 30W. However, underpowered USB chargers appears to be the norm.