You can say "I'm ___ing" to talk about either the present or the future.

In this example:

We're going to my in-laws' house this weekend.

...the speaker is talking about the future. This is a plan which they have already made.

In this example, the person is talking about something that is happening right now:

I'm watching the news.

You have to pay attention to the situation to figure out whether someone is talking about the present or the future.