A few factors...
1) What Uncle Slacky says. I already have a netbook, and don't feel any need to buy another one. I would guess a lot of people already have theirs, the new ones are not significantly better, so they aren't going to upgrade just to upgrade. (With the lack of Linux-based ones compared to earlier on they actually have been downgraded.)
2) **Windows**. The largest mistake they've made is to stop shipping most with Linux and stick Windows 7 crippled edition on them, then people that review, test, or use them view them as "barely adequate" or maybe just "inadequate", Win7 is too bloated for an Atom. Mine shipped with Ubuntu and it runs great. They've also let prices creep up and up as they add more RAM, faster Atoms, and so on, to try to accomodate Windows, as well as paying for that Windows license.
3) re Ramazan... Some Atoms *do* have this, my Z520 (1.33ghz Atom) supports VT-X (shows up in /proc/cpuinfo as vmx) as well as flexpriority (which apparently helps interrupt handling in virtual machines.) Also, ARM uses 1/10th the power, not "10 times less" (that would be a negative value.)
4) I have no intention of buying another Intel-based netbook. I'm quite chuffed at the possibility of buying an ARM-based one. I have a keyboard on my phone, and am not interested in a tablet without a keyboard either. So, it'll either be an "ARM Netbook", or a "tablet with a keyboard" -- I don't really give a toss which they call it. I like Android well enough but would prefer to just run Ubuntu for ARM (or some other Linux distro if 11.10 stays as wrecked as it is now...)-- I've run Debian or Ubuntu on MIPS, Alpha, PA-RISC, Sparc, and PowerPC (in addition to usual x86) and these are not second-class citizens -- as long as you've got enough RAM and enough processing power, you won't miss x86 a bit.