Intel Is Not The Whole Universe

If Broadwell, Intel's years-away new chip architecture, goes BGA will it be the end of swap-able CPUs?

Hardly.

http://phys.org/news/2012-11-intel-broadwell-cpu-swap-outs.html 

Two things this article embarrassingly left out: 
1) They forgot about AMD, Intel's major competitor. What a great way for AMD to capture the enthusiast market: Intel totally offends it. (Assuming AMD won't do the same thing and move to BGA.) 
2) They also don't mention that by the time the Broadwell architecture makes its debut, the PC maybe in single-digits of computing market share. Mobile devices, both phones and tablets, have no reason to stop their meteoric rise, especially as they become more powerful and functional for work tasks. Laptops have been capable desktop-replacements (in all but a very few scenarios) for years. It won't be long until tablets and even smart-phones become laptop-desktop replacements. 

Also, they declined to mention that Intel does know how to make awesome enthusiast motherboards - BGA may not necessarily result in the beigeification of Intel product.