Announcement came out of nowhere today. I was pretty sure they would be waiting to release another GT when the PS4 was getting its legs under it. Sony updated the GT5 sales numbers today aswell, it's shipped 10.66 million world wide, pretty impressive. Every GT has paseed the 10 million mark.
The most surprising bit of news is that GT6 is going to come out this year, which means Sony is going to probably move 4-5 million units of it (it's massively populat in Europe, it will sell 2.5-3.5 of those in the European territories, along with 1m or so in the US and maybe 500k in Japan). They're going to make some quick cash that way, lol.