Wasn't it a slightly less specialized world back then too? The software and hardware were tightly enough linked that you needed someone who could do both. I think Woz is a case of a mad genius being born in the time that suited him.
Nowadays a generalist is someone who can do both the front and back end of a website, let alone assembler or hardware. (That's why I find Jeff Atwood's keyboard work interesting, independent of the caliber http://www.codinghorror.com/blog/2013/08/the-code-keyboard.h...)
"Wasn't it a slightly less specialized world back then too?"
Yes. Byte had Steve Ciarcia's articles, which were one of the main features of the magazine. We used to modify and build hardware, not just to overclock it, but piggyback memory chips or talk to bench equipment in the lab.
By the time I got out of high school, military and university I had: Built a pirated Apple II+, etched circuit boards, worked with 20 different operating systems, built radios, modems, remotes, door openers, set up a BBS, repaired TVs and stereos for beer money, modified a radar system and so on...
A Mad genius, to paraphrase Ang ( from Avatar the last Airbender )
There is no parallel to him and i don't believe there is anyone who can do both original hardware design and low and high level coding like woz.