In my house for four people, we have 14 computers (several macs running windows included and even a Mac running OS X... Yuck), 3 iPads, 4 iPhones, an LG Windows Phone, Apple TVs and a stack of Cisco switches, routers, wireless access points a Juniper or two and some other toys.
With all the iPads, we use the PCs to do most things and the iPads as a "shit, the kid stole my laptop and I want to read the register" device and as a replacement for the crappy in car DVD players from NextBase.
However, my Series 7 Slate running Consumer preview has completely taken over all but my high end gaming and server needs. I even run Hyper-V on it. Since switching from network hardware engineer to network hardware installer (tired of coding), I have spent the past 2 months with my Slate for 8 hours a day or more. I watch Cisco training videos on it, develop Windows phone and iPhone apps on it, watch films on it, use iTunes in it, play games on it (DC Universe with a game pad, AngryBirds or Liesure Suit Larry without), I typed my resume in Microsoft Word with it, etc...
I still use my iPad to read eBooks to the kids before bed since I prefer Kindle App for iPad vs. Kindle App for Windows, but frankly, iPad is just a toy.
Oh and with my Push2TV, it's awesome for watching movies on the TV while I code on the tablet.
I also have started using Windows 8 on my laptops because it's just so damn nice. It's the faster and most responsive OS I've ever touched.
That being said... Just ordered the new Apple TV because I like the remote. Mac Minis are the best desktop/HTPC machine on the market (with Windows), Linux is the best server. Slates ate the best laptops and tablets with Windows 8.
Oh... Have an Android tablet somewhere too, have no idea what that's good for... Kindle Fire, it's like an iPad with a bunch more suck.