Unless you have a setup for it. Not really, a good CRT for the Dreamcast really makes a difference.
But the system itself is meh. Now don't get me wrong, I have an original Dreamcast and the last time I actually hooked it up was at least five years ago. Not that I don’t like the old girl, it’s just easier to emulate it.
1. You can use whatever controller you like
2. You can upscale, tweak, etc.
3. Load times, the Dreamcast wasn’t slow really, but it is still reading optical media. And no, I’m not in the optical media bad camp, but really a digital file is going to load quicker than optical. Not even an argument.
And unless you plan on playing copied games on the Dreamcast, the games are fairly high-priced anymore because of "Muh' nostalgia" and honestly, you may not even like the games. Like
@MajesticSiN said, emulate them at least first.
I know you have the little VMU games, but they’re Tamagotchi levels of interesting, honestly.