The Magpies' third choice keeper has benefited from an injury to Tim Krul to start two games for the club in the past week, first against Maritimo in the Europa League then his League Cup run-out on Wednesday.
The former Charlton man is delighted with his recent rise to prominence, and was extremely satisfied with his performances in both games.
"It's a completely different world," Elliot told the club's official website.
"The players you are up against, the players you are playing with - it's a dream come true.
"As a footballer you always want to play at the top places, and to get a chance to play at Old Trafford, I'm really pleased.
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"On a personal point of view I'm pleased that the gaffer has got the confidence in me, both in Europe and against a team like Manchester United.
"They have been two tough games, but I'm delighted to have played them both and it will be great for my career. I've done what I can do. I've made my saves, kicked well and just been solid.
"It's been tough with Tim doing so well and Harps doing well, so I haven't had the chance to prove myself, but I want to get as many games as I can and show what I can do.
"If the time ever comes that I'm needed in the Premier League, then great."
Elliot made some eye-catching saves at Old Trafford, but was powerless to prevent his side slipping to a 2-1 defeat.
Nevertheless, the 26-year-old is taking the positives out of the match, and believes that the performance demonstrates the quality of Newcastle's squad.
"It's bitter-sweet really," Elliot explained.
"We were really pleased with the performance of everyone but disappointed with the way it turned out. But the gaffer said he was proud of the performance from everyone.
"We had them on the ropes in the second half and it just shows what a great squad we've got.
"People say we're not the biggest but when you look at the amount of games we've played in such a short space of time and the amount of players who have played, they are all top-class players.
"We were able to bring on guys like [Shane Ferguson] - a full international - so that shows the strength in depth."