The IFAB voted unaminously in favour of the introduction of the development in a meeting in Zurich, ratifying both the Hawk-Eye and GoalRef systems, which is set to be first used at the 2012 Club World Cup.
"I am happy, I am pleased we are able to go forward," Blatter told Sky Sports News.
"When it comes to high level competition and a decisive moment, and you have the technology and don't use it - then something is wrong.
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"This is a real, real approach of modern times in football, it is so important because the objective in football is to score goals.
"New tactics and techniques with so many players involved in attack it is difficult to score goals so now we have the chance to identify it then it is good."
The 76-year-old has been renowned for his resistance to the introduction of technology and identified Lampard's wrongly-denied goal against Germany at World Cup 2010 as a turning point in his thinking."For me as Fifa president it became evident the moment what happened in South Africa in 2010," he continued.
"I have to say 'thank you Lampard'; I was completely down in South Africa when I saw that. It really shocked me, it took me a day to react.
"It happened again in Ukraine, and Ukraine can still not believe it now."