4 ms·This is cool. I hope the cost of eink plummets so this is actually viable.by bobsmooth 2y agoThis is cool. I hope the cost of eink plummets so this is actually viable.jtwaleson 2y ago4.2" three color modules are 12 USD on AliExpress without volume discounts. How much cheaper does it have to become to make it viable?bobsmooth 2y agoCheaper than that.