Synth Pop is a broad label; almost any act that is stylistically or commercially mainstream enough to be 'pop' and produces music based around synthesizer sounds could be said to fall under the umbrella of 'synth pop'. So while we could say that all these acts are 'synth pop', we can also look for more specific terms.
One term that seems to have evolved for a recent wave of artists who nostalgically reference 80s synth-pop and 80s culture is Synthwave. This seems a good fit for Futurecop! and Anoraak.
Russ Davies' Cinnamon Chasers project (from the few songs I've listened to) seems to have a slightly different range of influences, including 80s and early 90s techno, more recent French House, and mainstream electronic dance artists like Röyksopp. Nu-disco is a label that is used for acts that continue to develop the French House sounds and draw from its influences, but if I had to pick one genre label for them I might just go for 'dance' or 'electronic' to be safe!