On February 26th, Kindle customers will lose the ability to download eBook purchases directly to their PC. If you want to switch to a rival eReader brand in the future, I suggest that you use the soon-to-be discontinued "Download and Transfer via USB" feature to archive your Kindle library.
I just bought an ereader for my wife, I was not going to buy a kindle anyway but imo glad Amazon comforted me in my choice to stay away from their products.