Mount sizes for HDTVs
How do TV makers decide which VESA mounting pattern to use for their TVs? I am looking at getting a 46 or 47" TV and the mounting patterns I have found include 200X200, 200X600, 400X400. Why not just use 200X200 (note that LG uses 200X200 on some 47" models and on others they use 400X400) since using a 200X200 gives the consumer far more mounting options? And don't tell me it is weight or size given the LG example of using 200X200 on some 47" TVs.
And why don't mount makers (like Monoprice) make mounts where the "size" rating matches the weight rating? For example when you look at many of their mounts that are for 23-40 inch TVs can generally hold 80 lbs. But in my research on 47" TVs these generally weigh around 40 lbs. They seem to assume that mounts that can handle mounting patterns like 400X400 or 600X200 need to handle 100+ lbs, but that is not the case - even TVs far larger weigh much less. So if you want to use a mount with an extendable arm on a 47", 40lb TV that uses larger than a 200X200 mounting pattern then you don't have that many choices for mounts and you need to mount across multiple studs.
Why not make a mount like the Monoprice 5921 (I would link to a photo but the link is ***ed out) that can handle larger mounting patterns and doesn't require mounting on multiple studs? Even most 60" TVs weight far less than the 80 lbs that this mount is rated for.
Is it because mounts haven't been adapter to the lighter weights that we see on TVs in the last few years.