Talk to a RailFan - you will learn a LOT about Trains.

Antyodaya is a welcome concept ( Yes, it's just a renamed version of Jan sadharan, but better) and it's good to see some improvements being made to the low cost/unreserved sector other than simple capacity improvements.
Tejas (Renamed version of Shatabdi) will be a hit if our RM fulfills his promise by running them at the proposed speeds, though that doesn't look likely looking at the current schedules. IMO,given the facilities, they can be successful for 6-10 hr intercity journeys if they are run at the promised speeds. Of course, Shatabdi trains can be upgraded by providing them with Tejas rakes, but a price hike would be put up anyway irrespective of the name, because of the...
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on-board facilities, so a name change doesn't really matter much here.
Humsafar is a rather weak case as the enhancements in these rakes are not as fancy as Tejas, and are mostly regarding the safety and maintenance of the coaches. As such, a 20% fare hike for these trains will not go down well with passengers as there are no visible changes in passenger comfort. Again, their hope only lies with fast schedules ( which again, doesn't look likely.
IR seems to be on the right track in terms of improving on board facilities, but again it should be accompanied with better speed and maintenance of standards. Doing just one of these 3 things and ignoring the other 2, will just make these new trains another failure.