Decent review. Some of the photos aren't comparing the same position of the image, so it's hard to get a good feel of the comparison pictures.
Also wanted to point out that the review is wildly inaccurate when you said "only a handful of smartphones and tablets". Here's a quick rundown of NFC capable phones (just off the top of my head):
Blackberry devices: Q10, Z10, Q5, some older versions as well
Windows Phone 7/8 phones.
HTC One series
Samsung Galaxy S3, 4 / Note series
Google Galaxy Nexus, Nexus 4, Nexus 7 tablet, Nexus 10 tablet
Sony Xperia series
LG Optimus Series
Asus Transformer Infinity
Here's a ton more: (the list is out of date by over a year and is vastly incomplete, as it doesn't include Nexus 4, for example) http://en.wikipedia.org/wiki/List_of_NF ... le_devices
That's pretty much every major platform / company out there since about a year ago. It's not a "handful" by any definition of the word. Granted, not all of these are PlayMemory capable, but that's asides the point...