Seldane,
Do you own a gameboy player?
I recently picked one up, because I do not like staring at a small screen to play a game, I prefer messing with things on a larger screen. I found out there were some games on the GBA that may interest me (such as the updated Link), and I can pick them up for cheap! Due to my dislike for handhelds I never looked much into it. When I read abotu the GB Player a few months ago, it seemed pretty cool! It would give me a chance to play GBA, GBC, and GB games on a large screen. Pretty much an updated Super Gameboy!
It's not perfect, but neither was the Super Gameboy I used to own. Not all of Super Gameboy's borders or colour palettes are here, though that's no big deal, Super Gameboy was ten years ago.
The picture looks sharp enough for me. I don't notice any blurring. Things may appear a slight bit softer, however.
Also, not sure what these choppiness is you talk of. If it's present on a GBP it is probably also present on a Gameboy. So far, the few games I've played around with on a GBP have been fluid and good looking.
This reminds me of when people who are used to DVD complain about VHS' appearance on a large screen. There is a limit to how nice these things are going to look once you blow them up larger. There is also how Gameboy games were designed for smaller screens, so it doesn't bother me if it looks a bit "off" sometimes due to being blown up on a larger screen.
Also, I think the guts of the Gameboy player are pretty much the same stuff in a gameboy, from what I read. I've never dismanted one, so I can't say for sure.