The rumors of the new Apple TV don't even sound compelling. As of the latest rumors I've seen there is no HDMI 2.0 or "4K" support. So if they don't upgrade again for 2-3 years then thats a long time ignoring 4k content which they could charge a premium for streaming 4k content now as its still not mass market.
They seem to be pushing IoT and making the Apple TV the smart hub for the house. That 'could' be interesting, but it also could be a completely unused feature for 99% of customers and go no where.