What do you expect? It’s still the same gameplay, campaign and mechanics. The graphics is of course slightly improved, but this is still a great old game we all loved. And if you haven’t tried it, do it now, it’s one of the best strategies ever made.
This remake is a definition of disappointment. It doesn’t really upgrade the original AoE, it just brings a high-res HD picture. Needless to say, there has been "upatch HD", a community mod with widescreen, HD support, bug fixes, and other upgrades, which is totally free and much more fun that this "Definitive Edition". The $20 price tag is just a fraud, don’t buy it.