Title says all.
P.S. Sorry if I am in the wrong category.
buying a PS4 and a pc will end you up spending the same amount of money you would've spent on a gaming pc. So to answer your question, a gaming pc will be more of a viable choice. However keeping in mind that you will miss out on all the playstation exclusives and building a gaming pc for the first time requires a learning curve to be passed. Also, you mention a work 'laptop', if you need a laptop for its mobility then getting a gaming laptop might be a better investment
Well depending on your budget, you can get a nice high end gaming PC for $1200 which approximately close to the cost of a high end gaming Laptop. and then with the PS4 budget you can get a work laptop for portable use.
You could literally get all 3 if you really wanted to - you can build a very solid gaming PC for $1200, pick up the PS4 for $400, and get a non-gaming laptop for $500.