1. Don't buy a scan converter. You should be able to output to a 52 inch with your netbook through the VGA port. My Samsung 52 inch has a VGA port. I'm pretty sure yours does.
2. See 1.
3. LCDs, TVs, and Monitors all refresh much faster. Just use one of the many overlays to simulate scanlines. Certain CRTs already will have a noticeable effect, like mine. It should scale appropriately onto your screen but keep in mind the low resolutions of most arcade games(320x240 vs. 1900x1080)
4. I've already done it. It's not a big deal. I'm doing it on my room's 42 inch. By default it will look blurry. You can turn off all this stuff and it will just look blocky. Remember, you're not standing right on top of the TV.
Short answer, just buy a long VGA, DVI, or HDMI cable, depending on what your laptop can output.