In a lot of computing, somebody will often say "have you heard of such-and-such?" Truthfully, you'll say "no", but make a mental note to look it up later. Then, later, you look it up, and actually, it sounds very similar to something you do know about. It particularly affects me these days - I'm quite paranoid because I've been out of the industry for a few years, so am worried in case the world has moved on. I probably shouldn't be - I've been developing again now for a year and have probably come across most of what I'm going to find.
I've been reading today about Microsoft Azure. Not an environment I've used or know much about. But, really, having spent the day reading, Azure is based on nothing more than data centres. I was using data centres back in 2000! And virtualisation, which I've been using since 2006 or 7.
Of course, Microsoft Azure has added value in these last years, plus (obviously) this is Microsoft's take on something industry-wide. It is more than just virtualisation these days. There are virtual servers, of course, but also things like virtual databases and virtual messaging hubs for asynchronous communication.
I mean, I don't badge myself as an expert after a day, but it is nice to know that it is not so much a new technology, more just a new name.