If the crowds that visited the Gemini booth at CES 2018 are any indication, it may be a good time for the personal digital assistant to attempt a comeback. The Gemini folds open to reveal a physical keyboard, similar to the Psion PDA of the '80s and '90s. The big difference this time: the Gemini PDA is a full-fledged Android smartphone. Essentially, what you get with the Gemini is a small clamshell laptop -- with a 6-inch FHD display and 10-core MediaTek Helio X27 CPU -- that folds back up to make phone calls. The Gemini will come in both Wi-Fi-only and 4G models; the unlocked phone will work with all major U.S. carriers, according to its manufacturer, Planet Computers. The Gemini is poised to be a winner for those who miss their PDA of old, yet are still happy to be in the era of always-connected mobile devices. The Gemini is priced at $499 for the Wi-Fi-only model and $599 for 4G/Wi-Fi capability. It's expected to be commercially available in the next few months.