When Windows 7 comes along you can decide whether or not you wish to upgrade. Microsoft product launches are often later than expected for one reason or another.
The upgrade process will be fairly straightforward, so don't have any worries on that score. You may need a driver for something, but Windows 7 will have a comprehensive driver database, and it will look for any drivers it needs when it connects to the internet for the first time.
Windows 10 Home vs Windows 10 Pro comparison: Here are the extra features you get in the Pro version