The Silicon Valley California has been witnessing the two notable changes of late - the announcement of Larry Page as the replacement for the current Google CEO Eric Schmidt; and the Apple CEO Steve Jobs taking another `indefinite' medical leave.

After nearly a decade at the helm at Google, Schmidt intends stepping down in April, handing over the company's reins to the company's founding CEO Larry Page. While Page, along with Sergey Brin launched Google in 1998, Schmidt has largely been the public face of the company. It was under Schmidt's headship that the company transformed into its present position as the Internet search giant.

With Page taking over as CEO, Schmidt will continue to remain at Google as one of the members of the company's board of directors.

Meanwhile, the developments at Apple bring the company's chief operating officer Tim Cook as the stand-in CEO, in control of day-to-day operations; with CEO Steve Jobs proceeding on medical leave yet another time.

Earlier, in 2004, Jobs took leave due to pancreatic cancer; and, two year back, he has to undergo liver transplant. The most recent announcement about Jobs' medical leave, however, neither specified the reason for the leave nor the time-period for which he will be away.

As such, in spite of the fact that Apple reported record-high earnings for the 2010 last quarter, concerns about Jobs' health raises questions about the future of the company.