Ten years ago, maybe a bit less, there were a number of sites promulgated upon aggregating TV listings. Five years ago or so, they -- or the ones I was still aware of -- started disappearing behind page obfuscation and/or altogether. You might ask yourself and look into why.

In short, if it's a personal project, then go ahead and have fun. If it's a business idea, you'd better do some domain and market research before committing any significant resources -- pre-existing ventures appear to have exhausted themselves. Although with my avoidance of unnecessary Javascript and low use of mobile, perhaps I've just missed out on what they've become.