At the IFA show in Berlin, projector manufacturer JMGO launched its new Iris line. While externally similar to the N3 Ultimate and other models of its gimbal projectors, inside is a new light engine with even greater brightness and the new headline-grabbing feature at the show: a 120Hz refresh rate while running at full 4K resolution. A 120Hz refresh rate isn’t exactly new in projectors, and definitely not with TVs, but with projectors, that refresh has been historically limited to 1080p. Is this a big deal? Sort of. It’s an interesting technical feat for sure, and shows where projectors can grow. For most people, it’s not likely a huge deal. Yet, a new DLP chip and design like what’s in JMGO’s new projectors is definitely worth having a look at. So I did. Geoffrey Morrison/CNET All the refreshes fit to refresh  I got a brief look at the new Iris projectors at IFA, and there are two models. The Iris Ultra Max has a stated 6,500 lumens, a fully motorized gimbal and a higher native …