
Note that the h/w folks Savain loves don't love schematics
Verilog, VHDL, and stuff like SystemC are where it's for chip design. Text does have some real advantages for designing systems.
If you like graphical, the only truly successful example I can think of is [link|http://www.ni.com/labview/|this dataflow language]. Maybe you could add its [link|http://www.home.agilent.com/USeng/nav/pd.html?CT=PRODUCT&ID=588957&cmpid=95203|competitor] and [link|http://www.measurementcomputing.com/cbicatalog/cbiproduct.asp?dept%5Fid=333&pf%5Fid=1357|former competitor]
The analogy to hardware design (electrical and mechanical) doesn't work well, either. I don't see secretaries designing circuit boards. And, despite part libraries of [link|http://www.misumi-europe.com/|over 500000 parts] I don't see secretaries designing mechanical machines either. It still takes a lot of skill, and a lot of custom mechanical parts to glue everything together -- I see it happen every day.
--Tony