Screen/Battery/Boot times are all far better with the Asus Transformer than any netbook I've used, and better than pretty much every laptop as well - maybe excluding a MacBook air, which competes on boot times/screen.
But besides that the simplicity of use and the fact that you can just grab the screen and flop onto the sofa to "consume", and slot it into the keyboard to do some real work makes it more valuable than a tablet and a laptop seperately.
People here are a somewhat refined breed - but for *most* home users I can't see anything that I would want a PC for - I have a wireless router from my ISP, a network printer (or plug it into some routers) and maybe a small NAS, or cloud storage, or plug a USB drive into the router.
The Transformer can take external storage - SD cards, USB devices etc - it can push data to various network devices.
It can do word processing, email, FB, skype, twitter, games, media, browsing etc...
NB - I actually recommended that my parents get one - and they have. I really like it, although admit that the keyboard would take a few hours to get used to for serious work.