If google recognizes you as an open source contributor who does something significant, you get couple hundred $$$ worth of credit in their store (I wish I were joking)
Good PR, karma, ego boost for everyone work in the fields.
Like "Academy of motion picture arts and sciences" - "Academy of Computer Sciences, Software and Design" All winners get A Golden Keyboard and $1 million real cash.
If I have choice, I would like to nominate:
"Dennis Ritchie" - inventor of C language.
"Bill Joy" inventor of gdb.
"Guido van Rossum" inventor of Python
"Brendan Eich" inventor of Javascript.
"Linux"
"AT&T System V"
"BSD"In fact, more than half of the Turing awards are for practical inventions and software: work on programming languages and compilers, TCP/IP, operating systems, relational databases. And even many of awarded "theoretical" achievements had working software that demonstrated or automated the maths parts.
I'm not arguing against an "Art and Design" award - but just noting that the Turing award is not that far off, it covers Computer Science contributions much more widely than just proving CS maths theorems.