PS4 Slim will come in a 1tb variant, supports 5ghz wifi, and a vertical stand will be sold separately alongside it – confirmed by leaks of the PS4 slim user manual.
Images below show parts of the PS4 Slim user manual which show the model numbers of the PS4 Slim, 500GB CUH-2016A and 1TB CUH-2016B. Additionally, the exact dimensions of the PS4 Slim console are shown – Width 265 x Height 39 x Depth 288 mm. Also there are images showing the design and installation of the vertical stand that will be sold separately for the PS4 Slim.