Kosher Marketplace, Supersol and probably Eretz will have take-out open. Of the restaurants, I only know as of yet that Le Marais will be open. A few others, including Darna and Mendys on 33rd, will likely be open.
Glatt Mart will be doing Manhattan deliveries. 718-338-4040. I like their prepared food but my husband thinks its a little "heimishe". I've never ordered it for pesach but I'm sure they have the regular stuff and its probably a more economical option than supersol.