Good for you for getting your annual maintenance done.
If you haven't been doing it regularly, the chain should be cleaned and relubed as a minimum. Not a bad idea to replace the chain now, even though you might get another 500-1000 miles on it. If you replace it before it gets noticeable worn, you avoid replacing the cassette. If you wait you may have to replace both.
I'm sure they'll true your wheels whether you specifically ask or not. Do ask about hubs. If your hubs are sealed, they should check them but shouldn't need to do anything. If they are servicable bearing hubs, insist that they repack them. If you wait too long on that, you end up needing to replace cones (ask Mimi - cones can be hard to find). Likewise a serviceable bottom bracket should be repacked. The headset may not need service yet, but ask them to check it. Pedals need periodic lubrication also, probably through an injector port.
I wouldn't consider replacing cables to be an annual necessity. You can probably get 5 years out of a set of cables unless they get frayed or crimped. But not a bad idea to regrease them periodically. The shop may prefer the replace them when they regrease them, just to minimize labor and because they're cheap. Break pads need periodic replacement, but only when they are worn down noticeably which could be 3-4 years.
Oil is good, grease is better.
2007 Peter Mooney w/S&S couplers/Terry Butterfly
1993 Bridgestone MB-3/Avocet O2 Air 40W
1980 Columbus Frame with 1970 Campy parts
1954 Raleigh 3-speed/Brooks B72