I took the original post to mean that he was lining up on a trade course or machining course, rather than that he was looking to buy a machine.
All the machine companies out there stay current with the technology that is available, but machine tools have pretty long lives, so there are a lot of very useful machines out there making money, that were made by companies that are no longer in existence for one reason or another. On the other hand, outside the world of specialist machines, progress sometimes moves slowly, in favor of ease of service, standardized parts stores, and the like.
There are also a lot of machines out there that many have never heard of, because they do not work in a particular field, like, say, surgical implant parts, or similar fields where the machines are usually very small, the materials very expensive, and the parts are rarely the same from one day to the next.
Most of the machine tool names that people 'know' are names of companies that make general purpose machines suitable for wide range applications. Some of the neatest things I see (usually by accident) are machines that are built for some purpose or another that has been mentioned in a conversation in a not very near related field.
Too much info out there to stay on top of! Learn some interesting things trying, though!
Cheers
Trev