Is computer illiterate? Buy her or pops a Chromebook and they can't do their taxes on it.
Anyway, computer illiterate parents are not the market where Chromebooks are selling. Most are landing in the hands of computer illiterate children via schools looking for a "cheap laptop." Schools love them. They are inexpensive and low maintenance. You don't need IT with Chromebooks and that's exactly what schools want to hear. Too bad the kids can't really use Chromebooks to learn anything about computers.
20 years ago, Microsoft sold US education policy makers on the concept that "learning computers" meant learning the MS Office suite. That has produced a generation which is completely deficient in general computer knowledge. Tech giants are now flailing around trying to encourage kids to code now, because of the rarity of truly educated computer users.
Chromebooks will be the final nail in the coffin for US tech labor. "Computer people" in the US will be even more rare. Doing anything beyond web browsing and email is difficult on a Chromebook. I've used one as a daily driver for more than a year now. My C720 is my only laptop. I've installed Chrubuntu and chroots using Crouton. I've done Android development on it. You might think that would serve as proof that kids *can* use them to learn, but it is not the case.
My productivity has easily been a quarter of what it was on a 'real' laptop. I rarely do anything in linux on it, because every time I boot it up, I have a chrome window with my top 8 websites staring at me. Oh, hey, let me check the news on (HN | CNN | Slashdot | etc) really quick before I start work. 3 hours later, I'm bored with laughing at stupid pictures on imgur and wondering what it was I had planned to work on today. Even when you do want to work, the hardware is cheap, so everything takes just a little longer. Let me switch back to chrome and check email really quick while this thing compiles... Okay, that was funny cat picture... well, will you look at the time! I guess I will work some tomorrow instead.
And then there's the problem with Chrome's habit of autoupdating itself. Every auto update has the potential to hose your chroot environment. Meaning, oops, that autoupdate just blew your afternoon. Time to spend several hours reinstalling ubuntu and all the developer tools that took ages to set up properly.
In short, I wouldn't recommend a Chromebook as a real computer any more than I'd recommend an iPad. It is not a producer device. It's designed to allow passive consumption of whatever garbage lies on the web. I'll be getting myself a new 'real' laptop for xmas.