Specificalli, I intend to buy RTX 4070 TI. Will it become cheaper after or on April 13th, release date of rtx 4070?
No. Cards usually get their biggest price drops when the
next generation of cards comes out. However, nVidia has stopped even doing that (which is why I hate nVidia). The idea that nVidia would drop the price of a higher-tier card because they released a lower-tier card would be considered laughable at best.
The reality of the situation is this:
Like it or not, if you
must have a GeForce card (for whatever reason) you're going to get horribly fleeced.
If you don't care what it costs, if you don't care about value or you're an nVidia fanboy, then sure, get the RTX 4070 Ti. Just don't expect that the price of the card will drop (like, AT ALL) in the next three years.
I say this because the RTX 30-series cards have
still not managed to reach MSRP almost three years after they were launched. Don't expect AMD to help you either because they're sick and tired of getting nVidia to lower prices and not getting rewarded for their efforts. AMD knows that consumers (like you) will just buy the RTX 4070 Ti at a lower price if nVidia is forced to drop that price so why would they bother? Consumers (like you) who are perfectly happy to buy GeForce cards even when they're a bad deal are so numerous that AMD knows dropping its prices won't help its sales numbers, it will only help nVidia's.
Everybody is getting smacked in the face by the consequences of being willing to buy GeForce cards no matter what. The practice is selfish, stupid and has resulted in the current GPU market situation.
If you truly want a bad deal like the RTX 4070 Ti, you're just going to have to cough up the money, end of story.