It’s a 4K age these days. We’ve got 4K video streaming, 4K TVs, 4K monitors, 4K consoles, and, if you’re a Sony fan, even 4K smartphones. What we don’t have yet are 4K PCs, that is, PCs capable of reading and writing 4K content into 4K-compatible discs. That all changes with Pioneer’s introduction of two new Blu-ray drives meant for computers and computers alone. Not only are they able to read from Ultra HD Blu-ray discs, they can also write into BD-R discs for safe keeping.