Sony has issued a new salvo in the war of words against Nintendo's upcoming Wii U.

Speaking with Engadget and referring to Sony's ability to offer touch screen entertainment on a case-by-case basis, US Sony exec Jogn Koller stated: "We tell our PlayStation fans all the time that what the Wii U is offering is something that Vita and PS3 can do quite easily.

"It's dependent on the content. We need to make sure the content isn't force fed. And, to us, making sure that the gamer receives the right type of experience is what's most important. We're going to pick our spots, but that technology does certainly exist here."

Purchasing a PlayStation 3 and a Vita in Australasia represents a significant investment, more so than the predicted cost of the Wii U at launch, although Koller remains confident that existing customers will still see the value.

"You look at the Vita consumer and a very high percentage – almost all of them – own a PS3. So you see that crossover works."

A bundled offering of both the PS3 and Vita isn't out of the question either.

"As we look at the lineup, there are gonna be some opportunities to do that. Whether we want to bundle the hardware together remains to be seen," Koller explained.