partialTwo blind graders agree (D7, rule D16). Not in the audit sample (D11).
Grader A: partial
The upper and middle of the range existed in 2009: smartphones with high-resolution screens and e-book readers the size of a thin book. The lower end (rings, pins, credit cards with high-resolution displays) did not exist.
Test: Device-range test: phone and book-size devices were mainstream (smartphones and handhelds used by about a third of Americans online); ring, pin and card-size displays near 0%.
Smartwatch (Wikipedia) (retrieved 2026-09): Wrist-size computers were experimental in 2009.
Grader B: partial
Handheld devices with high-resolution screens (phones, iPod touch, Kindle at book size) were mainstream by 2009. The small end of the range (rings, pins, credit-card computers) did not exist as products.
Test: Device test: phones/e-readers with good displays mainstream; ring/pin computers 0%.
Wikipedia: iPhone (1st generation) (accessed 2026-09-28): 2007 iPhone: flash storage, multi-touch screen, no physical keyboard; 6.1M units sold to mid-2008.
Wikipedia: Amazon Kindle (accessed 2026-09-28): Kindle Nov 2007, 6-inch 167 ppi e-ink; Amazon e-books passed paperbacks Q4 2010 and print overall early 2011.
Wikipedia: Wearable computer (accessed 2026-09-28): Pebble 2012, Google Glass test 2013, Apple Watch April 2015; no commercial ring/earring computers documented.
All captured fields
rank
4
kind
decade_prediction
section
Computers
subject
Small but high-resolution interfaces
target year
2009
timing
in
position
Chapter 9, "2009"; item Computers 4 in Kurzweil 2010, p. 13
confidence
high
note
Wording as reproduced by the author in "How My Predictions Are Faring" (2010); book page not given there. Subject label is the essay's own item heading.