We're getting very close to not needing a PC/laptop.
My GF just got a new iPad.
Over the holidays, I revamped all her work spreadsheets from excel (Ugh!) to Numbers.
I simplified and standardized them, added formulas, made them all the same orientation, fonts, titles, added colors, etc. Made them all fit on one page. All in Numbers.
I did that on my iMac and now she has them all in iCloud (and DropBox) and on her new iPhone 5c and on her work PC (iCloud)....