This is in no way scientific BUT the CRTs that handled widescreen HD resolutions all kind of sucked. Back in the day when they were new I spent days researching and trying them out, alot of them had soft images, and EVERY SINGLE ONE of them had geometry issues that even professional repair places couldn't fix. The first place spent 2 weeks working on a Samsung set before finally giving in and telling Samsung to refund my money. CRTs can obviously produce razor sharp images at higher than SD resolutions. So I really think there was something about those widescreen CRTs that just fucked up the geometry handling of the tech. I don't know if there's a widescreen HD P/BVM out there, so maybe my theory is just in consumer sets. I can tell you this though I tried pretty much every model of consumer widescreen HD CRT and they ALL had geometry issues.
Yes, there are widescreen BVMs.