Yes, be afraid. Be very afraid. Windows 8 is coming (later this year) and unless you like learning something almost entirely new, you are going to hate it.
Fortunately, there should be at least a year of being able to choose which OS you want on your new computer if you buy it online.
This is an excellent article that does a nice job articulating where all the pain points are going to be in adopting this new OS.
As an IT administrator, having to adopt this scares the &*$%$ out of me and I will definitely be putting off any upgrade as long as I possibly can or until M$ comes to their senses.