"...a japanese digital camera of moderate price can easily beat a german film gear in terms of sharpness. Sad, but totally true for me. "
You should add the words "apparent sharpness". Images straight out of ALL digital cameras are soft compared to straight film images. Digital sharpness is the function of firmware in the camera (for jpgs) ... or application of sharpening programs after the fact. These sharpening programs tend to favor increasing edge contrast to give the appearance of sharpness ... which accounts for the actual separation of edges in the form of a white halo when an image is over-sharpened. Since edges are the main area sharpened it leads to the over-all plastic look of digital in areas not producing an edge.
To further aggravate the situation, Japanese lens designers ALSO tend to utilize edge separation as the touchstone for sharpness. German lenses, including Zeiss, favor micro contrast to achieve the appearance of sharpness ... without the harsh by-products of edge sharpness in out of focus areas.
The Digital Lemmings all actually believe that a 35mm DSLR can outperform a MF film camera simply because the broad areas are smooth. Further evidence of this attraction to "smoothness" at the cost of every other pictorial characteristic can be seen in the over application of Gaussian Blur to skin. The only POP these images would create is if you stuck a pin in a subjects cheek. A blow-up doll looks more human.
This is now the "standard" people aspire to, as they flock to digital capture without a clue what a image should look and feel like. It's not the digital camera's fault. It a mass of semi-blind people to whom the word "subtile" is meaningless as they process their 2D, smooth, ultra sharp looking, lifeless images.
For a majority, photography is a computer game.
Can digital work? I think so. I know a few others that have made it work. The right camera, in the right hands, guided by sensitivity and a subtile eye can work wonders.
Here's a snapshot I made of Irakly in poor light when my Leica 80/1.4 arrived ... straight out of the box and on to the Leica DMR set at ISO 400. Reminded me of old Ektachrome shots I used to love so much for male portraits in cloudy conditions.