"No more draughty churchyards or dusty records offices[...]"
Hm, have to disagree on that point. The internet is certainly a terrific resource but you can't do decent genealogical research in any depth without still visiting RO's and other archives to expand on, or confirm/confound your inital findings.
It remains true that only a portion of what exists is available online and, whatever you do find, don't rely on other people's uploaded research or transcription without checking details against original records for yourself, or you may end up barking up the wrong tree entirely. ;)