Yes, it could be bad news for places like HopScotch, the new(ish) deli, Nandi Nandi and possibly Tapa Tisserie.
A couple of campaigns against Costa opening up have been in the news recently, most notably in Totnes.
Aesthetically, a Costa would be infinitely preferable to a Domino's, and if there weren't already cafes on the parade it wouldn't be too bad.......but there are.