not just laptops and computers, even today we can use some smartphones used to mine, I've seen some people using Samsung S5 for mining
because the capacity of the Samsung S5 is very large and supports mining, in addition, we can mine by using ASIC.
Yes, maybe laptops and even some smartphones have technical preconditions for mining. But what would be the final result, is it's profitable? No, it's not.
Today it's not worth to cope with mining unless you have mining farm. Expenses that you as an individual have would much exceed your earning. So, don't go for such form of mining, it's not worth the costs and efforts.