No, try a MacBook Air, running iOS, but with a regular Ethernet jack on it, too.
Why the MacBook Air? Because its so lightweight and gets such great battery life now -- would probably do even better if running iOS instead of full OSX.
Why iOS? Because it's much harder for the average computer illiterate person to screw up the machine, and it still lets them get on the Internet, use Facebook, access email, and play games, which is all they really care about anyway.
Why an Ethernet jack? Because wi-fi simply isn't good enough sometimes. Also what if the wireless router gets its settings wiped and needs to be reconfigured? WPS is not the answer. Also Internet technical support is not going to troubleshoot connectivity issues over wi-fi and take the results seriously.