The article is not 'just clarifying that customs officers have the right to search your laptop'. It is also pointing out that now you need to declare if you have pornography when entering the country, and if you say yes, will need to go through the 'something to declare' lanes and answer questions about your pornography.
Do I want customs officials to be asking me leading and ambiguous questions like 'Where did you obtain your pornography?', 'Are you sure your pornography contains no images of people under 18 years old?', 'Is any of your pornography of a violent nature, simulated or real?', 'Does your pornography depict sexual acts with animals, living or dead?', 'Does your pornography contain images of people who look under 16 years of age?'. And I certainly don't want people poking through my porn collection. Sure, now I'm aware of this I can avoid it but a) that just points out how silly it is and b) I shouldn't have to go to the bother and c) don't like where these laws are leading.
And if you say no, and your laptop is searched anyway, there is now grounds to keep you out of the country.
As an Australian citizen, I certainly don't want to be interrogated like this. As an Australian citizen, I don't want guests visiting my country to be interrogated like this.