According to Grobgeboggt.de Apple is soon to release its own branded Apple Watch dock, along with a high price tag. 

Update – it is already in Apple Stores selling for £65. 

However, if you want a dock to charge your Apple Watch, I use a Orzly Apple Watch Night Stand (Amazon Link)
  
It uses the Apple Watch charging cable but is totally concealed and the ridge supports the watch when charging and prevents movement, which in turn prevents the watch coming off the charge point. It also works with both watch sizes and it has proven to be superb. Good value at £7.99 as well. It is available in 4 different colours. Personally I have the black finish.