If that happens, he'll be in the same position as George W. Bush, who was a fairly prolific emailer before becoming president but was not permitted to use the technology directly while in office.
As an aside, it may not always be a good thing. South Africa's former president Thabo Mbeki was quite well known for having a computer at his desk and a personal email account while in office. Unfortunately, he tended to use his to research crank AIDS activists online, write raving and offensive weekly newsletters on his party's official website and send off diplomatically-unsound emails to newspapers, unpopular researchers and other world leaders. Perhaps it is better to keep a president isolated to some extent.
As a voter, sure. Let them communicate with us directly so we can see who they truly are. Mbeki was recalled before his term was done, in part in response to his perceived arrogance and crazy ideas, both exposed in part through his personal communication to the electorate.