What's Roku? It's a device that connects to your wireless network and streams video via apps... anything from news to subscription-based services like Hulu Plus, Netflix, HBO Go, and Amazon Prime Instant Video. You pay for the box, and then it's just whatever you want to subscribe to or watch.
I've found that I don't even watch the cable TV, since I don't have a DVR. I catch up on my network shows on Hulu Plus, watch the latest DVDs via a 1-disc Netflix subscription, and watch BBC costume dramas free with my Amazon Prime membership. I watch significantly less TV (goodbye, Bravo and the Housewives!) and find I read a lot more. It's been a healthy switch for me, and it's significantly cheaper... Hulu and Netflix combined are costing me $15/month, and my basic cable service is $10/month. Compared to satellite, it's a steal... plus I'm much less addicted to the boob tube.
Have you ever thought about cutting the cord on your TV?