Intel just announced the next generation of connection standards and port protocols, Thunderbolt 4, which will be the successor to Thunderbolt 3, and it's important because a lot of future devices (laptops and cameras) and accessories (charging cables and external hard drives) are going to support it. So, what can it do and is it that much better?
At a glance, it doesn't appear that Thunderbolt 4 is going to be an absolute game changer for most people as it's not any faster. It's able to deliver the exact same max transfer speed (of data, video and power) as Thunderbolt 3, which is 40Gb/s speed. However, Intel says that a Thunderbolt 4 connection will transfer data more securely than Thunderbolt 3.
The most meaningful upgrade is that Thunderbolt 4 will be able to support two 4K displays (instead of Thunderbolt 3's one) or one 8K display. If you're a multitasker who normally uses a laptop with more than one external monitor, the Thunderbolt 4 upgrade will likely affect you the most.
Thunderbolt 4 will be supported on the next generation of computers that have Intel's latest and greatest chipsets; these computers will start rolling out this fall. The obvious question is: how will this impact future Macs?
Apple recently announced that it's making the jump away from Intel processors, and future Mac computers will have Apple's own homegrown ARM-based chipsets. And it's unclear yet if those future Macs will support Thunderbolt 4 or not.