TCL has put its Nxtpaper display technology, designed to be easy on the eyes like E Ink’s e-paper screens, in a slew of devices ranging from hefty 14-inch tablets to smartphones for kids. The new Tab 8 is the latest addition to TCL’s Nxtpaper lineup and with an 8.7-inch screen it sits somewhere in-between the company’s existing size offerings like the 6.8-inch 60 XE and the Nxtpaper 14. That also puts the Tab 8 in a sweet spot that could make it a tempting alternative to color screen…