Honestly, laptop webcam + flattering angle + decent lighting = also absolutely fine, but it's harder to get a nice angle with something built into the laptop.

IMO a DSLR would only be useful if you're going for a filmlike look of softly blurred backgrounds, or maybe low light shooting made possible by the bigger lens and sensor. At that point it's probably bordering on ostentatious.

At my last company the CEO had something like that, but he also used that setup for calls with investors and news outlets and such, so it made a lot of sense.