There are currently 9 free PS4 games available to add to your PSN account. Only available from March 25 8pm PDT to April 22 8pm PDT. No playstation plus required. Just log into PSN and add to your library:
https://store.playstation.com/en-us/category/9779f12f-50c8-4c07-8d20-47e21293b6c6
Ratchet & Clank is also still available for free until March 31 08:00PM PDT. Same as above, login to PSN and add to your library:
https://www.playstation.com/en-us/games/ratchet-and-clank/
Horizon Zero Dawn complete edition will be free from April 19 until May 14:
https://www.playstation.com/en-us/play-at-home/
 

The new PlayStation 4 firmware update will include external HHD support for game installation. Finally. I honestly didn't realize the original PS4s even had USB 3. They are also finally adding custom wallpapers via screenshots. About damn time. The wallpapers in the online store are complete garbage. I'd still prefer to use my own .jpg files like on the PS3, but modders used that feature as a way to hack the system which is why we never got the functionality in PS4. Using a screenshot is completely fine with me.
http://blog.us.playstation.com/2017/02/03/ps4-system-software-update-4-50-features-detailed/

For only $150 the Hori’s Tactical Assault Commander (TAC) Pro will give everyone on ps4 a huge advantage with mouse and keyboard controls. According to the box art of the product it is officially licensed by Sony and it's being sold at Gamestop and amazon. But if this is actually officially licensed then why doesn't Sony just allow keyboard and mouse input directly to the console so people don't have to pay $150?
http://kotaku.com/hori-tactical-assault-commander-pro-review-a-modest-mo-1788600202

Sony officially announced the "PlayStation 4 Pro" today:
No longer called the PlayStation Neo, the PS4 Pro will give us 4k gaming and HDR. I don't have a 4K tv so I'm in no rush to get one of these myself.
http://blog.us.playstation.com/2016/09/07/playstation-meeting-2016-introducing-ps4-pro-and-the-slimmer-lighter-ps4/
 

DX mentioned this to me earlier today. In one month the price will increase for PS+ by $10 per year. Not a huge increase, but it'll now be $59.99 starting September 22 2016:
http://blog.us.playstation.com/2016/07/27/playstation-plus-free-games-for-august-2016/
On a side note, I ordered a year's subscription from this site for $37.99 on sale:
http://www.saugagamers.com/product/playstation-plus-12-month-subscription-card-digital-delivery
$42.99 - $5.00 using promo code THANKYOU.
I found the deal on slickdeals:
http://slickdeals.net/f/8965647-playstation-plus-12-months-37-99-digital-delivery
I haven't gotten my code emailed to me yet, but the company updated their front page a few hours ago saying it could take a couple days for them to send out the codes because they're getting so many orders in. With the price increase I doubt it'll get much cheaper than this since even last black friday it was only on sale for $39.99.