Devices like this still have a screen and battery and mechanicals. Instead of $20 of CPU and $10 of RAM they have a $10 CPU that includes RAM. That's pretty much the only savings available.
On the other hand, tablets sell in huge volumes; this is a niche market. So it's quite probable that tablets and/or notebooks without a CPU will be more expensive than ones with a CPU.
http://www.isuppli.com/Teardowns/News/Pages/New-iPad-32-GB-4...
Devices like this still have a screen and battery and mechanicals. Instead of $20 of CPU and $10 of RAM they have a $10 CPU that includes RAM. That's pretty much the only savings available.
On the other hand, tablets sell in huge volumes; this is a niche market. So it's quite probable that tablets and/or notebooks without a CPU will be more expensive than ones with a CPU.