Apples upcoming wearable — the so-called iWatch — will come in two sizes, have a curved OLED display, will be able to track health and fitness data, and will include NFC, likely for making mobile payments, according to The Wall Street Journal. Specifics on Apples smartwatch are still relatively hard to come by, but more and more general details have been coming out ahead of its expected unveiling next Tuesday. The Journal reiterates that Apple is unlikely to ship the device this year, with Recode previously reporting that it should be expected in early 2015. Though Apple has criticized OLED displays in the past for having over-saturated colors, the technology is a logical choice for a smartwach.