I LOVED the Poketch in D/P. That was one of the best things about D/P. I don't really remember the Pokegear that well. I just remember the cell phone which quickly started to annoy me. I didn't mind Professor Elm calling me because he usually had important things to say like, "It's terrible! Get back here, now!" I'd be disappointed if they take that out, but when the stupid trainers would call me and say the same thing over and over again: "I just missed catching a Drowzee! I was so close! Darn it!" I kept catching myself wanting to reply, "Look, I've met you one time in which I kicked your butt. I'm not your friend. I don't care that you suck at your hobby and life in general. Stop calling me."
Unless Game Freak actually mixes it up a bit, for example; the trainers don't just reach a limit and then don't get any stronger. Maybe they can become your apprentice like in Emerald and you can train them and help them out then they can meet you in a Battle Tower or something. If it's just going to be them prattling on about nothing, give me the VS seeker please. Only let important people have my cell number. =D
But here's hoping they'll at least put in the calculator, item dowser, pokemon friend checker (lol), the step counter, and the breeding app. I didn't use the other stuff all that much.