It's true that most current games only need 8GB tops, but emerging AAA titles are recommending 16GB at this point. The price difference between 8GB and 16GB of RAM is not that high, and it will help prepare the system for future gaming:
SW Battlefront System Requirements & Recommendation:
Minimum PC System Requirements
OS: 64-bit Windows 7 or later
Processor (Intel): Intel i3 6300T or equivalent
Memory: 8GB RAM
Hard Drive: At least 40 GB of free space
Graphics card (NVIDIA): nVidia GeForce GTX 660 2GB
Graphics card (ATI): ATI Radeon HD 7850 2GB
DirectX: 11.0 Compatible video card or equivalent
Online Connection Requirements: 512 KBPS or faster Internet connection
Recommended PC System Requirements
OS: 64-bit Windows 10 or later
Processor (Intel): Intel i5 6600 or equivalent
Memory: 16GB RAM
Hard Drive: At least 40 GB of free space
Graphics card (NVIDIA): nVidia GeForce GTX 970 4GB
Graphics card (AMD): AMD Radeon R9 290 4GB
DirectX: 11.1 Compatible video card or equivalent
Online Connection Requirements: 512 KBPS or faster Internet connection
**Again to emphasize, for most current games you don't need more than 8GB, but if you are planning on having your a gaming system for quite some time 16GB of RAM is a good long-term investment for the future.