Find another decent tablet that lacks a microphone, camera, Bluetooth capability, is Wifi only (with no option for 3G/4G), no GPS capabilities, no accelerometer, no gyroscope, and very few apps, and I'll show you something that is not a true tablet.
It's an eReader with some extra bells and whistles. That's it.
Otherwise, you're looking at an extremely limited tablet versus a very capable PMP.
But that's not what this situation is. It's a very capable eReader versus a very capable PMP (although it's not really a "versus" situation since they aren't really competing, just as the Fire isn't really competing with the iPad).
Kindle Fire's Wikipedia: http://en.wikipedia.org/wiki/Kindle_Fire
"The Kindle Fire is a tablet computer version of Amazon.com's Kindle e-book reader."
Tablet computer Wiki Article: http://en.wikipedia.org/wiki/Tablet_computer
"A tablet computer, or simply tablet, is a complete mobile computer, larger than a mobile phone or personal digital assistant, integrated into a flat touch screen and primarily operated by touching the screen."
Just because it "lacks a microphone, camera, Bluetooth capability, is Wifi only (with no option for 3G/4G)" and has "no GPS capabilities, no accelerometer, no gyroscope, and very few apps" doesn't mean it's not a tablet.