I would expect Sony to release http://www.coroflot.com/tchi6/playstation-4/3 around the same time that http://www.coroflot.com/tchi6/xbox-720/4 comes out. So enjoy this scenario while it lasts. We will all be paying for online play and then we shall see what happens. . .
According to http://www.google.ca/imgres?imgurl=http://www.twistappel.com/wp-content/uploads/2011/04/xbox-360.jpg&imgrefurl=http://www.twistappel.com/microsoft-copied-sony-with-xbox360/&usg=__ohNrYRXSYG58uEy9z4CUiJeWpL0=&h=508&w=570&sz=159&hl=en&start=0&sig2=Hg3d4MBIv1W6QiaTBYJUkg&zoom=1&tbnid=z_z_9bbmmr4dUM:&tbnh=136&tbnw=153&ei=XB3MTYSUHsPX0QGgmJnSBg&prev=/search%3Fq%3Dxbox360%2Bcopied%2Bsony%26um%3D1%26hl%3Den%26biw%3D1579%26bih%3D723%26tbm%3Disch&um=1&itbs=1&iact=hc&vpx=124&vpy=105&dur=3227&hovh=212&hovw=238&tx=161&ty=131&page=1&ndsp=36&ved=1t:429,r:0,s:0. I think XBox360Delta is a more likely name.
Edit: Just as an additional note, unless PS4 has something spectacular over New-Xbox-Name-Here(They're almost the same save for BluRay ATM), I'm going for Xbox if they both want paid online. Lol