Mobile Display for 2 Websites

Hi all I have searched quite a bit and think this should be feasible, but maybe somebody has good suggestions on the specific hardware I should get. I would like to achieve the follwing: a mobile, battery operated, rasberry zero powered device with a nice display, with a gsm card, that has a kiosk style OS that always shows the 2 same websites side by side, and the pages should autorefresh. I'm thinking raspberry pi , original display with display case, gsm module, power bank, some kiosk style OS (or the standard OS?), i guess this should work out, right? thanks a bunch!