Gaming laptop... 1080p IPS or 4k to handle older games?

I am looking to get a new laptop for gaming, but it needs to support my older (within the last 5-10 years tops, anything generally supported on Win7) games as well. It needs to have a modern GPU and portable form factor, in addition to an SSD for boot times. I've been taking a hard look at the 2015 Razer Blade FullHD (1080p IPS non-touch) and the 2015 Razer Blade QHD+ (4k...

Gaming laptop... 1080p IPS or 4k to handle older games?

Gaming laptop... 1080p IPS or 4k to handle older games?