Whether you use/buy/like Apple products or not - it's clear they (largely under Jobs' guidance) have been one of the fundamental forces shaping the computing and consumer electronics landscapes for over 3 decades.
The man was a giant in his industry - up there with Gates and Torvalds. The world will continue on without him, and innovation/invention/market-leadership will rise, fall, and change in spite of him. Getting accolades from the likes of Gates, Brin, Page, Zuckerberg et al shows a lot about Jobs. Getting accolades from Obama shows different things. Im my opinion, filling the first 2 or 3 pages of HackerNews says an awful lot about how people in this community respect the man.
but 56 is too young for anyone and my condolences to those who are affected by this.