Certainly not meant to be a complete list, here is a rundown of what streaming video access you might find across some OTT and gaming devices as you consider your holiday shopping:
PS4 - Amazon Instant, Crackle, Crunchroll, EPIX, Hulu Plus, NBA Game Time, Netflix, NHL GameCenter Live, Redbox Instant, VUDU, Yupp TV
Xbox One - Amazon Instant, Crackle, CW, ESPN on Xbox One, FOX NOW, FXNOW, Hulu Plus, Internet Explorer on Xbox One, Machinima, MUZU.TV, Netflix, Redbox Instant, Target Ticket, TED, Twitch, Unvision Deportes, Verizon Fios TV, VUDU, Xbox Video
Apple TV - iTunes, Crunchyroll, Disney, Disney Junior, Disney XD, flicker, HBO Go, Hulu Plus, MLB.TV, MLS, NBA League Pass, NHL Game Center, Netflix, PBS, Qello, Sky News, Smithsonian Channel, Watch ESPN, Weather Channel, WSJ Live, Yahoo! Screen, You Tube, Vevo, Vimeo
Chromecast - Google Play, HBO Go, Hulu Plus, Netflix, Pandora, You Tube
Roku - Amazon Instant, AOL On, AP, BBC, Blockbuster on demand, Crackle, dishworld, EPIX, Flixster, Fox News Channel, HBO Go, Hulu Plus, MLB.TV, MLS, NBA League Pass, NHL Game Center, NBC News, Netflix, Pop Flix, Sky News, Snag Films, Target Ticket, Vevo, VUDU, Warner Archive.
So depending which video content apps you prefer, your decision on buying a box for access depends on what they carry and distribute. Of course, with the two gaming systems, you primary purchase decision might not even include streaming video. And as for Apple TV, Chromecast, and Roku, you just might be able to access your video content from your blu-ray player or smart TV directly.