I have an XBox One and a Xbox 360, the 360 is from 2008 or so and is pretty much relegated to Netflix and movies. There are some pretty good deals for both the new Slim Xbox One and the PS4. The PS4 Pro probably is not an option simply because I can't make use of the 4K ability for the foreseeable future but may be an option for a bit of future proofing. The Xbox One Scorpio is planned Christmas 2017 so I doubt my 360 will last as it is starting to get cranky.

I have no PlayStation footprint at all which makes me think a second Xbox one is probably a better choice but would appreciate some other opinions.

I have 2 XB1 and 1 PS4, I spend 80% of my time on the XB1 and only use the PS4 when I'm in the mood for titles that are platform specific (Bloodborne, Driveclub) or where I played there first and the characters don't carry across (Destiny), or where friends I want to play with are on PS4 and not XB1.

Right now the two platforms pretty much do the same thing as far as I'm concerned, maybe with XB1 having the edge with backwards compatibility feature.

wait for the next XB1, scorpio... and burn in hell PS4, lol... jk...xbox man all they way here.

wait for the next XB1, scorpio... and burn in hell PS4, lol... jk...xbox man all they way here.