Take NuBSG for example. I liked it very much. But I think it gained nothing from being a reboot. The show could have been a wholly original universe without any of the cachet or stigma of being linked with the original BSG, and been just as well recieved. Plus it would have had more creative freedom.
Rebooting a property is a lazy marketing tool to get us to feel nostalgia while watching some regurgitated content. It is stifling to the creative people producing that content, and it is stifling to those of us consuming it, even if we can't stop indulging ourselves.
The sole reason nuBSG had a known brand name slapped on it was so that the SyFy execs would feel comfortable greenlighting it as a known quantity, on the questionable but persistent assumption that it will make success more likely. The fact that what was left of the BSG fanbase was so rabidly against it argues otherwise - no doubt, the viewers were mainly new fans.
But this notion persists, and explains the constant parade of remakes of American and foreign shows regardless of whether there's any fanbase left, or even if the fanbase is against the remake. (Judging from the hilariously savage online commentary, CBS' Sherlock Holmes series in development,
Elementary, seems to be about as popular among Holmes aficionados as RDM's remake was among the BSG faithful.)