Was this worth the wait? And yes, those are Doctor Martens.
Capaldi himself is quoted, in a BBC press release, as saying:
He’s woven the future from the cloth of the past. Simple, stark, and back to basics. No frills, no scarf, no messing, just 100 per cent Rebel Time Lord
Meanwhile, Moffat proffered:
New Doctor, new era, and of course new clothes. Monsters of the universe, the vacation is over – Capaldi is suited and booted and coming to get you!