Personally, I see Linux as a user based platform with no dreams of following the Model of MS. It has no intention of being a Mega Million dollar enterprise, moreso an Academic enterprise.
Place like Libraries, Schools, University's, and some Government departments have been interested in taking up particular Linux platforms, kids love it. There have been projects specifically intended for young school children which have been very successful.
Linux certainly is not trying to become a corporate giant, therefore there is no problems on the horizon as far as malware.
Unix was the beginning."...During the late 1970s and early 1980s, the influence of Unix in academic circles led to large-scale adoption of Unix (particularly of the BSD variant, originating from the University of California, Berkeley) by commercial startups, the most notable of which are Solaris, HP-UX, Sequent, and AIX, as well as Darwin, which forms the core set of components upon which Apple's OS X, Apple TV, and iOS are based."
"Unix (officially trademarked as UNIX, sometimes also written as Unix in small caps) is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs."
"During this period (before PC compatible computers with MS-DOS became dominant), industry observers expected that UNIX, with its portability and rich capabilities, was likely to become the industry standard operating system for microcomputers."
In 1991, a group of BSD developers (Donn Seeley, Mike Karels, Bill Jolitz, and Trent Hein) left the University of California to found Berkeley Software Design, Inc (BSDI). BSDI produced a fully functional commercial version of BSD Unix for the inexpensive and ubiquitous Intel platform, which started a wave of interest in the use of inexpensive hardware for production computing. Shortly after it was founded, Bill Jolitz left BSDI to pursue distribution of 386BSD, the free software ancestor of FreeBSD, OpenBSD, and NetBSD.
In 1991, Linus Torvalds began work on Linux, a Unix clone that initially ran on IBM PC compatible computers.
http://en.wikipedia.org/wiki/Unix