But how many consumers will realize that GDDR5 and DDR3 is any different? PS3's got 8GB, Xbox has 8GB, that's what it's going to come down to to consumers.
Not many, a similar amount of people who'll realise that XBox3 has internal low latency memory to take a large bandwidth load off its main memory while PS4 doesn't.
PS4 certainly looks the more capable machine looking at specs, there's a bigger difference than last gen between PS3/360 definitely. However people need to stop comparing 8GB GDDR5 to 8GB DDR3 directly and declaring it'll make a huge difference to games performance. Other aspects of the hardware make it much closer than the 178GB vs 68GB bandwidth numbers would suggest.