The Surface family includes Surface Pro, Surface Laptop, and other Surface products. Surface is designed to help organizations, students, and consumers be more productive.
Microsoft offers no true details on the docking station, but after studying the picture they have of it and describes that it does recharge the tablet, I do believe it does it via the standard USB port.
If true, you can use the wide variety of USB chargers with it as well. BUT, this is just a guess.
The docking station "DOES" recharge the tablet! It does have its own power supply as well.
If in doubt, wait for others to order and comment on it here in the forum. The preliminary reviews of the Surface 3 itself have been coming around as "extremely positive" from those who are using the loaner models issued to news agencies.
I "may" get one myself to include the docking station. They do not ship out until May 5th and more information may come out on them. Keep the web link that Clare\_Hs provided and it will be updated when more information is released.