Inc: Like mobile phones, laptops kept on getting smaller, until they didn’t. No one wants to read email on a postcard-size screen or type on keys the size of Tic Tacs. But do away with those elements and you can make an impressively tiny — and cheap — “laptop.” That’s what Google has done with the Chromebit, an offshoot from its popular line of Chromebook computers that resembles a highlighter marker and will cost less than $100 when it goes on sale this summer.