Are many creatives using laptops? Most creative people I use are using desktops with big screens or iPad pros with an Apple pencil.

As powerful as laptops are now, yes, lots of of creatives use laptops. There's entire industry (well, were before covid) of doing fast turn time on-site on video/photo editing. Lugging desktops around in giant cases paying surcharges for heavy and extra bag charges on airlines is incredibly expensive.