I recently picked up a PlayStation 4. I've had both the Xbox 360 and the PlayStation 3 in the past, though I haven't had a gaming system recently (in the past 6 months, at least).
I actually ended up waiting in line for a bit near GameStop to pick one up as I hadn't intended on buying one until I got an itch to two weeks before launch.
I picked up a few games: Killzone: Shadow Fall, FIFA14, Need For Speed: Rivals, Call of Duty: Ghosts.
Most of the games are a lot of fun, though I haven't tackled much of the campaign in Call of Duty. I've found myself playing FIFA the most and I'm very much enjoying their "Career" mode.
Next gen games are pretty, but they're nothing remarkable right now. If you're on the fence about buying one now, I'd probably wait until early next year when the lineups start to ramp up more towards the new systems.
The design of the new PS4 is breathtaking. It has sharp, sleek angles on the front and back - almost like the Aventador. It's a bit more than just a plain, black box (which is what I think the Xbox One looks like).
Sony also introduced a new controller for the system, the DualShock 4.
It's very comfortable. Fits in my hand easily and doesn't feel uncomfortable, even after prolonged use. It has a nifty touchpad on the top, but that's about all the touchpad is - nifty. There's no real use for it yet, but developers may do more with it in the future.
There's also this blue light bar at the front of it, which is used with the Playstation Camera (an optional accessory that I didn't pick up - not worth it just yet.) Some aspects of the light are kind of cool. For instance, Killzone will change the light from Green to Yello to Red depending on your health level. FIFA seems to do it based on the color of your team, but I can't confirm that.
Sony has a sort of ambient light theme going on with this generation's console. The PlayStation itself has a light all along the top of the box that changes color from blue during regular use, white when it's turning on or off, and yellow when it's in standby. It's kind of soothing blue, so it's not distracting during gameplay and gives the system sort of a futuristic theme.
There are some glaring flaws with the system currently, but they're mainly software issues, which will hopefully be resolved with a patch in the future. You can't store or playback local content; the UI isn't wonderful, though it is very snappy; PlayStation Network has had some issues with the amount of PS4s connecting to it; The DualShock's battery isn't great - just 8 hours.
Overall, though, I'm really happy with the system. I haven't had an incredible amount of time to sit and play some games, but from the time I've spent with it, I've had a lot of fun. It sort of just gets out of the way between you and the game, which is all you can really ask for from a box of this nature. For $399, it's not incredibly expensive, but it's not a must have at this very minute either.
Oh! One last thing. I'll be moving to London this January for around 8 months, so look for that in the coming months.