60+ FPS easily, in fact, you can do 4k gaming with it (but at only 30hz due to HDMI limitations). You seem to question the power of GTX 10 series. Other than that, you can play games at 1440p at completely maxed out settings on every game. You will have a good experience.
However, since your monitor is 144hz (refresh rate), you will only see visually 144 FPS max, despite what the framerates on benchmarks say.
Sounds good enough if its 60+ its all good you are right i had doubts but did a bit of research i found out that these new pascal gpus for laptops are close to desktop performance i dont mind 4k for now 2k is great