It might be, but Alive was much more than just if the tests pass or not

Might be. Also, in any case - this adds stuff that wasn't in the original Alive AFAIK - supposedly it knows to only run tests that were affected by your last edit and show line-by-line red/green/gray coverage indicators: did someone say NCrunch?

Correct. Alive was focused on a chosen method - so you chose one method, the test case to check that method, and then it ran. You could then check what execution would look like in called methods, but it was not project/solution wide.