Answer:
Let me just write two rudimentary drafts on this essay of laptops vs tablets. Personally, I think laptops are better, so I'll say that in my essay.
Thesis: Laptops on the whole are better because of their ease of access, software availability, and streamlined feel.
Now let me pick one of those points and write a topic sentence:
Topic: The ease of access on laptops, especially keyboards, make laptops a better choice.
Topic: The wider range of software available for laptops makes them a clear choice over tablets.
I don't know what you think, but this is what I'd do!