Is e-masters from IIT kanpur is worth it?

No it isn't. Any Premier institute in this country you want to go to, you need to be in person.
Let's understand that the pedagogy is not any different in Premier institutes vs normal colleges, there's just 1 distinction that matter - The students. The crowd that comes in, going there meeting and talking and involving yourself with this community is the best thing that happens in these colleges. Because of them is why great companies come in, not because the teaching is excellent etc

You should check for course components and see if the skills it will help develop are valued or not in your industry, role profile.

You can do course A, B, C. However if they are not valued, they will help in building your knowledge or your tool set but may not necessarily bring you promotion or higher package.