Desktop pc or laptop in 2018 ?

It depends on what your intention is. If you want a flat out answer. PC has a lot more room for customization and upgrades. If your more about travel but still want a beefy computer. go with a multiprocessing laptop. aka gaming laptop suitable for specs. If you want a laptop that can go beyond and above. go with a modular laptop that can use desktop hardware. You would be looking at a hefty tag as well as weight. it would be quite heavy. similar to the weight of the old alienware mx18's.

my suggestion would be to figure out your needs and address it by that. if you want a pc that can handle basic web browsing. stick with a mac. XD garbage machines. Literally only thing valuable on those is the crappy brand. (I know ill get flamed for that one tho. but speaking from an IT standpoint. Macs are garbage.)