It does make for a long-ish phone but the hardware keyboard would always be available for those that want to use it.
That differs from the Priv, which has a hidden keyboard that slides out from under the display. With the Vienna design, the phone is likely slimmer than the 9 millimeter thick Priv.
There's little else information available other the reported phone renders at this time.
Look to the Priv, though, and you can largely guess what to expect: It would make sense for BlackBerry to take advantage of the same -- or at least, very similar -- set of components inside the Priv for us in the Vienna.
As a reminder, the Priv has a 5.4-inch OLED display with 2,560 x 1,440 resolution, a Qualcomm Snapdragon 808 processor paired with 3 GB of memory, and an 18 megapixel rear camera, to name a few specifications.