In short, the future of warfare is in special operations, and the Pentagon will need a lot more operators. The future of the Marine Corps is as a special operations force that functions in a sustained combat mode.
Organizationally, the Marine rifle squad as we know it today will no longer exist. Each squad will have a signals intelligence specialist, data and communications specialists, demolitions experts, one or two corpsmen, a sniper, and two or three machine gun teams -- only one or two team members may be certified "JTACs" but all must know how to coordinate the use of precision munitions and air assets via multiple radio and data waveforms. From the lowest-ranking member of the team to the general officer leading the joint task force headquarters, live video feeds will stream continuously, giving every warfighter a clear, concise picture of the battlefield. Rarely will the Marine of the future use his personal weapon; "rifleman" will become an antiquated term.
To operate in small teams that can coordinate a massive precision-engagement campaign, Marines will have to change the way they fight and train. The ethos of "every Marine a rifleman" will shift to "every Marine a JTAC," or joint terminal air controller. A Marine or team that cannot communicate on the battlefield will die. Marines will manage and become experts on dozens of different communications platforms ensuring double and triple redundancy.