Apple TV represents a bold step forward for Apple's set-top box, but there are a number of reasons why some users might want to wait until Christmas to pick up the device, if not longer.

Limitations in Siri and search are disappointing. Current apps are underwhelming; App Store itself needs work. The most expensive set-top box available. Siri Remote is expensive to replace. No 4K video support. Cable subscription apps still must be authenticated one-by-one. No optical audio out.

For now, before the tvOS App Store has time to grow and mature, and before Apple has a chance to work out some of the kinks and bugs on the fourth-generation Apple TV, the main question for prospective buyers should be: How invested are you in the Apple ecosystem

The Siri Remote with touchpad works great; Universal search finally makes it easier to locate content; The App Store and iCloud integration are off to a promising start; Game controller support is already better than on iOS

Siri doesn't support the App Store or Apple Music -yet; Why no iOS Remote app support; At $149; some may want to wait for more cord cutting incentives

The perfect addition to the household that loves its iPhones and iPads. Buy it.

Finally wrenched into the present, this Apple TV is a solid update that's brimming with potential.

Third-party games and apps; Stable and responsive; Siri could be a game-changer; Very fast; easy set-up

Lacking some key apps; Siri Remote can irk; No 4K support

Apps tailor-made for TVs make a lot of sense. In a way, the TV is technically the biggest computer most of us would have in our homes. But while the idea is sound, there's very little consistency in TV operating systems.

Siri Remote is great; Slick user interface; Universal search is promising

Pricing approaches console territory; Few compelling apps outside video and games; Optical audio port is gone

Good once you get it working.it took a while to set up

The fourth generation Apple TV is undoubtedly the best. It features a richer integration with the internet, offers pleasing performance and a better value for money ratio. If you're a venerable couch potato, the Apple TV is the best companion you can have (apart from a bar fridge), but it does have...

Apple TV is a gorgeous gateway to Apple's world of movies and TV, but the absence of major apps at launch hampers its appeal in the UK.

The new Apple TV delivers the most polished video experience today, with speedy reactions and a familiar yet attractive interface; It has the best remote on the market; Siri's voice search makes finding stuff to watch even easier.

Apps from most major UK terrestrial channels are missing, as are services such as Sky's Now TV and Amazon Video; Apple TV costs more than similar devices such as the Roku, Amazon Fire TV and Chromecast; Non-entertainment apps aren't very compelling yet.

It's been more than three years, but we finally have a new Apple TV ($149; 32GB). The last time Apple updated popular media streamer was back in 2012, and it has really started to show its age.

Simple, attractive tvOS interface; New app store greatly expands functionality; Excellent iOS device integration; Handy new remote with microphone for voice control

Pricey; No 4K support; Disappointing non-Apple music options

Update: Amazon Video on an Apple TV? At one time this was an impossible dream, but it seems as though there's a good chance of it actually happening this summer now that the two companies have called a truce. Will we see Amazon on stage with Apple at WWDC 2017? We're crossing our fingers.