You can still buy laptops with 16:10 aspect ratio, but I think the people that explicitly prefer it are the minority at this point. I'd say most people don't really care.
Actually, laptops as media devices is an argument against having the same resolution as televisions.
When one watches a television, one generally operates the television and media source via a remote control, which has dedicated buttons for most functions.
When using a laptop for a media device, one generally does not have a remote control. The controls are usually done as on-screen controls that you manipulate with the pointer.
Hence, for a laptop used as a media device, 16:10 makes more sense than 16:9, because it provides room for the controls outside the video.
Why oh why do we measure screen size diagonally and not area or something that actually makes sense.
I do know that I much prefer gaming and coding on a square display.
Because most consumers are just users and they don't want to see black bars when they watch a movie.
Sure, you could simply slap any resolution in a PC monitor.
But if you keep the aspect rate constant across devices, you can easily change displays. Why? Example: 2nd monitor, and especially the big screen TVs that are being used in place of projectors nowadays.
Funny that the 13' MacBooks (Pro/Air) still have a 1.6 (16:10) ratio, and the 11' has a 16:9 ratio