The current speculation has Microsoft offering a 12-inch tablet, like the current Surface Pro 3, and a huge 14-inch model with a 1440 x 2160 resolution. That works out to a 185ppi pixel density. The slate is rumored to be free of bezels, and there is talk that Microsoft will use the new Skylake Core chipset from Intel. Up to 16GB of RAM will be available, with native storage running as high as 500GB. Windows 10 OS will be pre-installed
According to those familiar with Microsoft's plans, the company didn't want to mess with the design of the Surface Pro 3, so the Surface Pro 4 will have basically the same look as its predecessor. Microsoft GM Brian Hall has stated that the next generation of the Surface Pro will be compatible with the Surface Pro 3's accessories, meaning that the Docking station and the Type Cover from the current model will fit on the Surface Pro 4. We could still see an improved Type Cover for the new slate be revealed on Tuesday, loaded with new features.
In addition, we could see a new stylus. Microsoft acquired the Israel company N-Trig, which produces the stylus technology for the Surface tablets. Considering that the new Microsoft Edge browser on Windows 10 has some functions that use handwriting, a new stylus for the Surface Pro 4 is warranted.
Microsoft raised the bar tremendously high with the Surface Pro 3, making it hard to surpass with the Surface Pro 4. But now that Apple has an iPad challenger to the Surface Pro line, the software giant cannot take even one second to slack off in the high-end tablet market (or the enterprise tablet market, or the large-screened tablet market, whatever you want to call it). The results of this hard work will be displayed this coming Tuesday.