I do from time to time.
And I know there are many members here that use them.
I still like to use a nice Parker.
I have seen these "pens", as you call them, but cannot connect them to the PC. Are they WiFi or Bluetooth?
Regarding the main topic: it has been my observation that the Japanese, as a culture, admire small precision crafted items. As a personal anecdote: in the late 1960's, when I was in Electronics class in High School, my Japanese friend made a capstan drive tape recorder no bigger than a pack of cigarettes. Witness the popularity of K-class and other small cars in Japan. For marketing to the U.S., however, the Japanese (and others) make their export products much larger to cater to (most) American tastes.