I doubt 2018 will be up against 2017, the PS4 is starting to get old and market saturation is slowly starting to set in, too. There's also not much Sony can do anymore with the price; a 50$ price cut is probably incoming this year but this will be probably the lowest the console will sell outside of promos
I do think however that while the PS4 as a whole won't be up, the PS4 Pro sales will be higher than 2017, slowly drawing closer to the base model's sales
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/