Is 2GB RAM enough for Windows 8/8.1?

Most, if not all, the new baytrail tablets only have 2GB of RAM. Do you guys think that would be sufficient? My main reason of asking is that the Dell Venue Pro 11 is available with Baytrail with 2GB RAM, and Core i3 with 4GB of RAM for $300 more ($500 vs $800). Thoughts?