「もう宇宙旅行に気軽に行ける時代が来てもいいと思うんだけどなあ。」 - I think it's about time that we can easily take a trip into space.
そろそろ村上春樹はノーベル賞もらってもいいころなんだけどなあ」ー I think it's about time that Murakami won a Nobel prize.
You would think we would be able to travel to space without much difficulty in this day and age.
この場合、次のような言い方ができますよ。
ーYou would think we would be able to travel to space without much difficulty in this day and age.
「この時代までに気軽に宇宙旅行ができてると思うよね」=「宇宙旅行に気軽に行ける時代が来てもいいと思うよね」
You would think XX would be able to ... in this day and age. を使って表現できます。
ご参考まで!