My laptop is a few years old, and can still handle anything I throw at it, to include heavy duty video editing. It can handle 4k, but as I don't have the bandwidth to upload 4k, I do my video work in 1080p
It's got a good (for the time, anyway) I7-4700mq at 2.4GHZ - it's got some sort of built in auto-overclocking whatsit that boosts performance as needed, or with a button press.
16GB of bitchin fast RAM
GTX 780m - 4 GB of GDDR5 , and I've got it set to pull from system RAM as needed.
2 256 GB SSDs raid0'd together for the Win7 install + programs, games, etc
1 256 GB SSD off on its own for /users and various light duty storage - I've also got a smallish swap partition here, rarely used but some programs freak if they don't find one.
1 2 TB platter drive for pics videos etc
No complaints.